Armstrong Bros. Tool Company

Table of Contents

• Introduction
• Early Tools
• Alloy Steel Tools
• Sockets and Drive Tools
• References and Resources
• What's New (Last Updated June 30, 2008)
  Recent changes to this page:

  • 06/30/2008: Added an Armstrong 1172-L Combination Wrench.
  • 06/07/2008: Added an Armstrong 1122 Ignition Wrench.
  • 05/27/2008: Added an Armstrong 1728 Open-End Wrench.
  • 04/06/2008: Added an Armstrong H-140 3/4-Drive Universal.
  • 03/01/2008: Added an Armstrong S-40 1/2-Drive Flex-Head Breaker Bar.
  • 02/21/2008: Added an Armstrong H-1230 3/4-Drive Socket.
  • 02/01/2008: Added an Armstrong ST-1240 1/2-Drive Socket.
  • 01/24/2008: Added an Armstrong 1168-L Combination Wrench and an Armstrong 25-524 Flex-Socket Combination Wrench.
  • 01/22/2008: Added an Armstrong S-818 1/2-Drive Socket.
  • 01/20/2008: Added an Armstrong 8033 Offset Box Wrench.
  • 01/17/2008: Added an Armstrong 31 Open-End Wrench.
  • 01/15/2008: Added an Armstrong H-1231 3/4-Drive Socket.
  • 01/09/2008: Added an Armstrong 903 Open-End Spud Wrench.
  • 01/05/2008: Added an Armstrong S-91 1/2-Drive Ratchet.
  • 12/21/2007: Added an Armstrong Armaloy ST-1222 1/2-Drive Socket.
  • 12/20/2007: Added an Armstrong S-1224 1/2-Drive Socket and an Armstrong ST-1224 1/2-Drive Socket.
  • 12/19/2007: Added an Armstrong XX-110 1 Inch Drive Extension.
  • 12/15/2007: Added an Armstrong Armaloy H-110 3/4-Drive Extension.
  • 12/13/2007: Added an Armstrong Early 807 Single-Box Wrench.
  • 12/12/2007: Added an Armstrong H-20A 3/4-Drive Breaker Bar, an Armstrong XX-50 1 Inch Drive Ratchet, and an Armstrong XX-1284 1 Inch Drive Socket.
  • 12/11/2007: Added an Armstrong Armaloy ST-1234 1/2-Drive Socket.
  • 12/06/2007: Added Armstrong Armaloy H-12xx 3/4-Drive Sockets.
  • 12/05/2007: Added an Armstrong Armaloy H-15 3/4-Drive Socket Set.
  • 11/17/2007: Added an Armstrong S-110P 1/2-Drive Extension.
  • 11/15/2007: Added an Armstrong S-20A 1/2-Drive Breaker Bar.
  • 11/09/2007: Added an Armstrong 661G S-Shaped Wrench.
  • 10/14/2007: Added an Armstrong T-4 Specialty Wrench.
  • 10/09/2007: Added an Armstrong 1159-A Combination Wrench.
  • 09/28/2007: Updated catalog info.
  • 09/05/2007: Added patent dates from catalog.
  • 07/07/2007: Added an Armstrong XX-1264 1 Inch Drive Socket.
  • 07/06/2007: Added an Armstrong XX-1258 1 Inch Drive Socket.
  • 06/16/2007: Added an Armstrong S-15 1/2-Drive Speeder.
  • 06/05/2007: Added an Armstrong HA-51 3/4-Drive Ratchet and an Armstrong H-115 3/4-Drive Extension.
  • 06/04/2007: Added an Armstrong 1731-A Open-End Wrench, an Armstrong H-140 3/4-Drive Universal, and an Armstrong H-1258 3/4-Drive Socket.
  • 06/03/2007: Added patents.
  • 05/28/2007: Added an Armstrong Armaloy 4122 Flare-Nut Wrench.
  • 05/25/2007: Added an Armstrong S-41 1/2-Drive Breaker Bar.
  • 04/27/2007: Added patent table.
  • 04/21/2007: Added an Armstrong-Vanadium 1033-A Open-End Wrench.
  • 04/09/2007: Added an Armstrong X-1268 1 Inch Drive Socket.
  • 02/14/2007: Added an Armstrong 637 Check-Nut Wrench.
  • 01/05/2007: Added an Armstrong 7725 Box-End Wrench.
  • 01/02/2007: Added an Armstrong 1727 Open-End Wrench.
  • 12/20/2006: Added an Armstrong 1163 Combination Wrench and an Armstrong 1166 Combination Wrench.
  • 12/16/2006: Added an Armstrong 6725 Box-End Wrench.
  • 12/08/2006: Added a rare 2028 Obstruction Wrench.
  • 11/01/2006: Renumbered figures.
  • 10/25/2006: Added a S-50 1/2-Drive Ratchet.
  • 10/13/2006: Added a 7729-A Hi-Tensile Box-End Wrench.
  • 10/10/2006: Added a 1731 Alloy Open-End Wrench.
  • 10/07/2006: Added a 5037 Heavy-Duty Offset Box-End Wrench.
  • 10/02/2006: Added a 7731-A Box-End Wrench.
  • 09/29/2006: Added a M-51 9/32-Drive Ratchet.
  • 09/28/2006: Split into two pages, added a 2426 Special Box-End Wrench and a 8727 Offset Box-End Wrench.
  • 09/25/2006: Added a 1029 Open-End Wrench.
  • 09/23/2006: Added a F-51 3/8-Drive Ratchet.
  • 09/19/2006: Added a S-91 1/2-Drive Ratchet.
  • 09/16/2006: Added a NMA-51 1/4-Drive Ratchet.
  • 09/13/2006: Added a F-91 3/8-Drive Ratchet.
  • 09/12/2006: Added a S-115 1/2-Drive Rotating-Grip Extension.
  • 09/11/2006: Added a S-140 1/2-Drive Universal.
  • 09/10/2006: Added a FA-50 3/8-Drive Ratchet.
  • 09/09/2006: Added a SA-51 1/2-Drive Ratchet and a FA-51 3/8-Drive Ratchet.
  • 09/08/2006: Added a S-50 1/2-Drive Ratchet and a S-110 1/2-Drive Rotating-Grip Extension.
  • 08/20/2006: Added a S-51 1/2-Drive Ratchet.
  • 08/12/2006: Added a 624-A Check-Nut Wrench.
  • 08/05/2006: Added page, no content yet.

Introduction

Company History

The Armstrong Bros. Tool Company began in 1890 as a maker of bicycle parts and service tools, founded in Chicago by four brothers. Their first manufacturing operations were conducted literally from a backyard wooden shed, and the brothers also operated a retail store for their bicycle parts.

In 1895 Armstrong introduced what would become their first major product, a tool holder for lathe cutting bits. Developed from their own manufacturing operations, the Armstrong tool holder was a forged handle that accepted small interchangeable cutting bits, thereby replacing the individually forged cutting tools previously required. This dramatically reduced the time and expense involved in making lathe cutting tools, and it's fair to say that these tool holders revolutionized the industry.

With the success of the tool holder, in 1900 Armstrong built their first real factory at 617 Austin Avenue in Chicago. This was replaced a few years later in 1905 by a 100,000 square foot brick factory at 317 N. Francisco Avenue, a site they would occupy for many years.

Up until 1909 Armstrong concentrated primarily on tool holders and related products, but in 1909 they started producing a line of drop-forged wrenches. This line of tools continued to expand over the years.

In 1948 the company moved from the Francisco Avenue site to 5200 W. Armstrong Avenue, where they remain today. A second manufacturing facility was added in 1974, located in Fayetteville, Arkansas.

In 1994 Armstrong was acquired by the Danaher Group, a conglomerate with other tool company holdings including Allen, K-D, Matco, and Moore Drop Forging. Armstrong operates now as the Industrial Hand Tools division of Danaher.

More information on the history and development of Armstrong is available from the company's www.armstrongtools.com web site.

Patents

Armstrong was a highly innovative organization from its beginning, and received (or licensed) many patents over the years. Their early catalogs even include a list of patent dates in the front, a thoughtful addition that would have been more useful if the patent numbers had been included as well.

Trademarks

Armstrong registered a number of trademarks, including the well-known Strong-Arm logo, the Armstrong name, and "Armaloy", their trademark for alloy-steel tools.

Tool Identification

Armstrong tools are generally clearly marked with the Armstrong name or trademarked logo, and so are easy to identify. Early tools may be marked with symbol consisting of an "A" within a triangle, referred to here as the A-Triangle logo.

Manufacturing Dates

Armstrong is not known to have used any kind of a date code marking for its tools. Without such markings, any estimation of manufacturing dates will have to be based on other information, such as the design or style, trademarks, finish, and so on.

Probably the most important date marker for Armstrong tools is the "Armaloy" trademark, registered in 1946 and (presumably) marked on alloy-steel tools shortly after that. In this article we'll assume a manufacturing date of 1947 or later for Armaloy-marked tools.

Another useful indication of the manufacturing date follows from the 1978 introduction of a new product numbering system. The new system assigned a five digit model number to all tools, with part of the number indicating a category for the tool and the final digits typically encoding the size. The new model numbers were first used in Armstrong catalog 880 of 1978, and that catalog includes a cross-reference table of old and new numbers.

Early Tools

Carbon steel was the dominant material for toolmaking until around the mid 1920s, when various alloy steels came into general use.

624-A 7/16x9/16 Check-Nut Wrench

Fig. 1. Armstrong 624-A 7/16x9/16 Check-Nut Wrench.

629C 3/4x7/8 Check-Nut Wrench

Fig. 2. Armstrong 629C 3/4x7/8 Check-Nut Wrench, with Inset for Reverse Detail.

Fig. 2 shows an Armstrong 629C 3/4x7/8 open-end check-nut (thin) wrench, marked "Armstrong Chicago U.S.A." on the face, with a forged-in A-Triangle logo on the shank. The overall length is 6.5 inches.

The inset shows the reverse side markings, with the model number "629" in raised letters and "C" stamped into the shank. The mix of forged-in and stamped markings probably indicates that one forged blank could be used to make several wrench models.

807 1-1/16 Single-Box Wrench

Fig. 3. Armstrong 807 1-1/16 Single-Box Wrench, with Inset for Reverse Detail.

Fig. 3 shows an early Armstrong 807 1-1/16 hex single-box wrench, marked with the model number forged into the shank, and with the A-Triangle logo forged into the reverse.

The overall length is 9.3 inches, and the finish is plain steel.

903 11/16 Single-Open Spud Wrench

Fig. 4. Armstrong 903 11/16 Single-Open Spud Wrench, with Inset for Side View.

Fig. 4 shows an early Armstrong 903 11/16 open-end spud wrench, marked with the model number and A-Triangle logo forged into the shank, and stamped "Hardened" on top.

The overall length is 8.9 inches, although part of the pointed handle appears to have been broken off. The finish is plain steel.

The opening is stamped "3/8 NUT", a reference to the U.S.S. Size Convention used on older wrenches.

Later Carbon-Steel Tools

Armstrong continued to produce certain tools in carbon steel models even after the widespread adoption of alloy steels, for applications where the greater strength (but higher cost) of alloy steel was not needed.

31 25/32x7/8 Open-End Wrench

Fig. 5. Armstrong 31 25/32x7/8 Open-End Wrench, with Inset for Side View.

Fig. 5 shows an Armstrong 31 25/32x7/8 open-end wrench, stamped on the face with "Armstrong" and "Made in U.S.A." with the Strong-Arm logo.

The overall length is 9.4 inches, and the finish is gray paint with polished faces.

637 1-1/16x1-1/4 Check-Nut Wrench

Fig. 6. Armstrong 637 1-1/16x1-1/4 Check-Nut Wrench.

Fig. 6 shows a later checknut wrench, an Armstrong 637 1-1/16 by 1-1/4 thin open-end wrench, stamped on the face with "Armstrong" and "Made in U.S.A." with the Strong-Arm logo.

The overall length is 10.1 inches, and the finish is gray paint with polished faces.

661G 3/8x1/2 S-Shaped Open-End Wrench

Fig. 7. Armstrong 661G 3/8x1/2 S-Shaped Open-End Wrench.

Fig. 7 shows an Armstrong 661G 3/8x1/2 S-shaped open-end wrench, stamped on the face with "Armstrong" and "Made in U.S.A." with the Strong-Arm logo.

The overall length is 4.0 inches. The original finish was black paint, but most of the paint has been worn off.

This wrench is listed in the catalogs as a heavy-duty model for hex-head cap screws.

Alloy Steel Tools

Armstrong was one of the earlier tool makers to use of alloy steels for their hand tools. Their 1923 catalog lists a line of "Aero" tappet wrenches made with a chrome-nickel alloy steel, and their 1927 catalog claims that alloy steel tools were first offered in 1919. The 1919 date, if true, would place them close to the earliest known usage. (Herbrand is thought to have used alloy steels in 1919, when their "Van-Chrome" trademark was registered.)

By 1927 Armstrong was offering a substantial selection of double-open and tappet wrenches made with chrome-vanadium steel, and this expanded in the next few years to include obstruction wrenches and a line of thin single-open wrenches with 30-degree offset heads. (These latter items were offered as part of the Blackhawk-Armstrong line; see our article on Blackhawk-Armstrong Tools for more information.)

Box-end wrenches were probably first offered in the late 1920s, but we don't have a catalog reference until 1935. However, the Armstrong line of single-offset box wrenches closely resembles those offered by Blackhawk in the late 1920s, and even have the same model numbers. Given the known connection with the Blackhawk-Armstrong wrenches, it seems very likely that Armstrong was the manufacturer of these single-offset wrenches as well.

The earlier alloy tools were generally marked with "Chrome-Vanadium", "Alloy Steel", or some equivalent, but in 1946 Armstrong registered the trademark "Armaloy" as the standard marking for alloy steel tools.

Open-End Wrenches

Armstrong-Vanadium 1027 19/32x11/16 Open-End Wrench

Fig. 8. Armstrong-Vanadium 1027 19/32x11/16 Open-End Wrench, with Insets for Reverse and Logo.

Fig. 8 shows an Armstrong 1027 19/32x11/16 open-end wrench, marked "Armstrong-Vanadium" in forged raised letters on the shank, with "Drop Forged Chrome-Vanadium Steel" forged into the reverse.

The overall length is 7.0 inches.

The upper inset shows the small "Armstrong Chicago, U.S.A." stamped into the reverse face, without the Strong-Arm logo. This is believed to indicate earlier production than the more common stamped marking "Armstrong Made in U.S.A." with the Strong-Arm logo.

Armstrong-Vanadium 1033-A 7/8x15/16 Open-End Wrench

Fig. 9. Armstrong-Vanadium 1033-A 7/8x15/16 Open-End Wrench, with Inset for Reverse Detail.

Fig. 9 shows an Armstrong 1033-A 7/8x15/16 open-end wrench, marked "Armstrong-Vanadium" in forged raised letters on the shank, with "Drop Forged Chrome-Vanadium Steel" forged into the reverse. The faces are stamped "1/2 NUT 5/8 CAP" and "5/8 S.A.E.", references to the older USS and SAE size conventions.

The overall length is 9.5 inches, and the finish is nickel plating.

The reverse face (not shown) is stamped "Armstrong Chicago, U.S.A.", but without the Strong-Arm logo.

1727 9/16x5/8 Open-End Wrench

Fig. 10. Armstrong 1727 9/16x5/8 Open-End Wrench, with Inset for Reverse Detail.

Fig. 10 shows an Armstrong 1727 9/16x5/8 open-end wrench, marked "Made in U.S.A." with the Strong-Arm logo on the face, and with "Alloy Steel" stamped on the reverse shank.

The overall length is 6.8 inches, and the finish is chrome plating with polished ends.

1728 9/16x3/4 Open-End Wrench

Fig. 11. Armstrong 1728 9/16x5/8 Open-End Wrench, with Inset for Reverse Detail, ca. 1942-1945.

Fig. 11 shows an Armstrong 1728 9/16x3/4 open-end wrench, stamped "Made in U.S.A." with the Strong-Arm logo on the face. The shank is stamped "Chrome-Vanadium" on the front, with "Armstrong" and another Strong-Arm logo on the reverse.

The overall length is 7.9 inches, and the finish is plain steel with polished faces.

The plain finish is believed to iducate production during the 1942-1945 war years.

1029 11/16x25/32 Open-End Wrench

Fig. 12. Armstrong 1029 11/16x25/32 Open-End Wrench, with Inset for Reverse Detail.

The overall length is 8.6 inches.

1731 3/4x13/16 Open-End Wrench

Fig. 13. Armstrong 1731 3/4x13/16 Open-End Wrench, with Inset for Reverse Detail.

The overall length is 9.4 inches.

1731-A 3/4x7/8 Open-End Wrenches

The next figures show examples of model 1731-A 3/4x7/8 open-end wrenches.

Fig. 14. Armstrong A-1731-A 3/4x7/8 Open-End Wrench, with Inset for Reverse Detail.

Fig. 14 at the left shows an earlier Armstrong A-1731-A wrench, marked "Made in U.S.A." with the Strong-Arm logo on the face, and with "Chrome Vanadium" on the shank.

The overall length is 9.5 inches.

Fig. 15. Armstrong Armaloy 1731-A 3/4x7/8 Open-End Wrench.

Fig. 15 at the left shows a later 1731-A wrench, marked "Made in U.S.A." with the Strong-Arm logo on the face, and with the "Armaloy" trademark on the shank.

The overall length is 9.3 inches, and the finish is chrome plating with polished faces.

1029-C 11/16x13/16 Open-End Wrench

Fig. 16. Armstrong Armaloy 1029-C 11/16x13/16 Open-End Wrench, with Inset for Reverse Detail.

Obstruction Wrenches

Obstruction wrenches were a specialized subset of open-end wrenches designed for work in tight spaces. These wrenches first became popular in the late 1920s, and several different obstruction wrench designs were in common use. Armstrong's design featured two different opening sizes placed at nearly right angles to the wrench axis, and was very similar to the design used by J.H. Williams.

Armstrong obstruction wrenches were assigned model numbers by adding 2000 to the industry-standard number for the equivalent open-end wrench. (See our table Industry-Standard Wrench Models for more information.) For example, a wrench with sizes 19/32x25/32 would be an industry-standard model 28, and therefore became a model 2028 obstruction wrench.

Armstrong was a manufacturing partner for Blackhawk and the corresponding Blackhawk-Armstrong obstruction wrenches are basically identical to Armstrong's production, except for the markings. Examples include the Blackhawk-Armstrong 2029 Obstruction Wrench and Blackhawk-Armstrong 2731 Obstruction Wrench.

Examples of obstruction wrenches similar to the Armstrong models can be seen in the Billings M-2030 Obstruction Wrench and Williams 2021 Obstruction Wrench.

Alternate obstruction wrench designs were used by companies such as Bonney and Herbrand, and examples of their production can be seen in the Bonney 2031 Obstruction Wrench and Herbrand 1827 Obstruction Wrench.

2028 19/32x25/32 Obstruction Wrench

Fig. 17. Armstrong 2028 19/32x25/32 Obstruction Wrench.

Fig. 17 shows a rare Armstrong 2028 19/32x25/32 obstruction wrench, marked "Armstrong Chicago, U.S.A." on the face, with "Drop Forged Chrome-Vanadium Steel" forged into the shank.

The overall length is 7.7 inches, and the finish is nickel plating with polished faces.

The reverse side of the shank has been ground smooth and has no markings.

Ignition Wrenches

1122 11/32x11/32 Ignition Wrench

Fig. 18. Armstrong 1122 11/32x11/32 Ignition Wrench, with Inset for Reverse Detail.

Fig. 18 shows an Armstrong 1122 11/32x11/32 obstruction wrench, stamped "Armstrong U.S.A." and "Armaloy" on the reverse.

The overall length is 3.7 inches, and the finish is polished chrome.

Box-End Wrenches

5037 1-1/16x1-1/4 Heavy-Duty Offset Box-End Wrench

In the mid to late 1930s Armstrong began offering a series of heavy-duty offset box wrenches, recommending them "for the heaviest industrial and oil field work." These were massively built wrenches with round shanks, and were assigned model numbers in a 5xxx series with an industry-standard suffix. (A separate 8xxx series provided regular-duty offset box wrenches.) The 1939 catalog listed nine models ranging from the 5035-A of sizes 1-1/16x1-1/8, up to the 5053 with sizes 2-9/16x2-3/4.

Fig. 19. Armstrong 5037 1-1/16x1-1/4 Offset Box Wrench, with Insets for Side View and Reverse Detail.

Fig. 19 shows an Armstrong 5037 1-1/16x1-1/4 offset box-end wrench, marked "Armstrong-Vanadium" with the Strong-Arm logo, and with "Made in U.S.A." and "Chromium-Vanadium" on the reverse.

The overall length is 16.9 inches, and the finish is plain steel.

6725 7/16x1/2 Box-End Wrench

Fig. 20. Armstrong 6725 7/16x1/2 Box-End Wrench, with Insets for Side View and Reverse Detail, ca. 1942-1945.

Fig. 20 shows an Armstrong 6725 7/16x1/2 box-end wrench, marked "Made in U.S.A." with the Strong-Arm logo, and with "Chrome Vanadium" on the reverse.

The overall length is 5.5 inches, and the finish is plain steel.

2426 Special 13/16x7/8 Box-End Wrench

Fig. 21. Armstrong 2426 Special 13/16x7/8 Box-End Wrench, with Insets for Side View and Reverse Detail, ca. 1942-1945.

Fig. 21 shows an Armstrong 2426 Special 13/16x7/8 box-end wrench, marked "Made in U.S.A." with the Strong-Arm logo, and with "Chrome Vanadium" on the reverse. The overall length is 11.4 inches, and the finish is plain steel.

The "Special" mark on this wrench indicates a non-standard or special-order size. In this case the standard 2426 model had sizes 3/4x7/8, so this particular wrench was made as a special size based on the standard model.

The 24xx series was Armstrong's earlier numbering system for angled box wrenches, not based on industry-standard wrench numbers. The 1935 and 1939 catalogs both show the 24xx models, but by the time of the 1948 catalog, these models had been superseded by a 7xxx series using an industry-standard suffix.

On the assumption that the 24xx models were still being made in the early to mid 1940s, the plain finish on this wrench would indicate a production date from 1942-1945. But if the 24xx series had in fact already been superseded by 1942, the plain finish might indicate much earlier (e.g. 1920s) production.

7731-A 3/4x13/16 Box-End Wrench

Fig. 22. Armstrong 7731-A 3/4x7/8 Box-End Wrench, with Inset for Reverse Detail.

Fig. 22 shows an Armstrong 7731-A 3/4x13/16 box wrench, marked "Made in U.S.A." with the Strong-Arm logo, and with "Alloy Steel" on the reverse.

The overall length is 11.6 inches, and the finish is chrome plating with polished ends.

7725 7/16x1/2 Box-End Wrench

Fig. 23. Armstrong 7725 7/16x1/2 Box-End Wrench, with Inset for Reverse Detail, ca. 1942-1945.

Fig. 23 shows an Armstrong 7725 7/16x1/2 box wrench, marked "Made in U.S.A." with the Strong-Arm logo, and with "Hi-Tensile" on the reverse.

The overall length is 7.8 inches, and the finish is plain steel.

7729-A 3/4x25/32 Box-End Wrench

Fig. 24. Armstrong 7729-A 3/4x25/32 Box-End Wrench, with Insets for Side View and Reverse Detail, ca. 1942-1945.

Fig. 24 shows an Armstrong 7729-A 3/4x25/32 box wrench, marked "Made in U.S.A." with the Strong-Arm logo, and with "Hi-Tensile" on the reverse.

The overall length is 11.6 inches, and the finish is plain steel.

8727 Armaloy 9/16x5/8 Box-End Wrenches

The next two figures show examples of the 8727 offset box wrench.

Fig. 25. Armstrong Armaloy 8727 9/16x5/8 Box-End Wrench, with Insets for Side View and Reverse Detail.

Fig. 25 shows an earlier Armstrong 8727 9/16x5/8 offset box wrench, marked "Made in U.S.A." with the Strong-Arm logo, and with "Armaloy" on the reverse.

The overall length is 9.7 inches, and the finish is plain steel.

The rough, unplated finish of this wrench suggests that it was probably made during the wartime period, but the "Armaloy" marking would normally indicate a manufacturing date after 1946. To reconcile these observations, this wrench may a very early example of the use of "Armaloy", perhaps an informal marking before the trademark was actually registered.

Fig. 26. Armstrong Armaloy 8727 9/16x5/8 Box-End Wrench.

Fig. 26 shows a much later version of the Armstrong 8727 box wrench, marked "Made U.S.A." and "Armaloy", with the model number on the reverse.

The overall length is 9.7 inches, and the finish is chrome plating with polished ends.

8033 13/16x31/32 Box-End Wrench

Fig. 27. Armstrong 8033 13/16x31/32 Box-End Wrench, with Insets for Side View and Reverse Detail, ca. 1942-1945.

Fig. 27 shows an Armstrong 8033 13/16x31/32 offset box wrench, marked "Made in U.S.A." with the Strong-Arm logo on the shank, with "Hi-Tensile" on the reverse.

The overall length is 14.5 inches, and the finish is plain steel.

Combination Wrenches

1159-A Armaloy 11/32 Combination Wrench

Fig. 28. Armstrong Armaloy 1159-A 11/32 Combination Wrench, with Inset for Reverse Detail.

The overall length is 4.0 inches, and the finish is polished chrome.

1163 Armaloy 9/16 Combination Wrench

Fig. 29. Armstrong Armaloy 1163 9/16 Combination Wrench, with Inset for Reverse Detail.

The overall length is 5.9 inches, and the finish is polished chrome.

1166 Armaloy 3/4 Combination Wrench

Fig. 30. Armstrong Armaloy 1166 3/4 Combination Wrench, with Inset for Reverse Detail.

The overall length is 8.1 inches, and the finish is polished chrome.

1168-L Armaloy 15/16 Combination Wrench

Fig. 31. Armstrong Armaloy 1168-L 15/16 Combination Wrench, with Insets for Side View and Reverse Detail.

Fig. 31 shows an Armstrong 1168-L 15/16 combination wrench, stamped "Made in U.S.A." with the Strong-Arm logo on the face, and with the "Armaloy" trademark on the shank.

The overall length is 13.2 inches. The finish is chrome plating with polished faces.

1172-L Armaloy 1-1/8 Combination Wrench

Fig. 32. Armstrong Armaloy 1172-L 1-1/8 Combination Wrench, with Insets for Side View and Reverse Detail.

Fig. 32 shows an Armstrong 1172-L 1-1/8 combination wrench, stamped "U.S.A." and "Armaloy" on the shank, with the model number and fractional size on the reverse.

The overall length is 15.9 inches, and the finish is polished chrome.

25-524 Armaloy 3/4 Flex-Socket Combination Wrench

Fig. 33. Armstrong Armaloy 25-524 3/4 Flex-Socket Combination Wrench, with Inset for Reverse Detail, 1978+.

Fig. 33 shows a fairly recent Armstrong 25-524 3/4 flex-socket combination wrench, stamped "U.S.A." and "Armaloy" on the front, with the model number and fractional size on the reverse.

The overall length is 10.9 inches, and the finish is polished chrome.

Flare-Nut Wrenches

4122 Armaloy 11/16 Flare-Nut Wrench

Fig. 34. Armstrong Armaloy 4122 11/16 Flare-Nut Wrench.

Fig. 34 shows an Armstrong 4122 11/16 single-ended flare-nut wrench, marked "U.S.A." with the "Armaloy" trademark.

The overall length is 6.9 inches, and the finish is polished chrome.

Specialty Tools

T-4 Shock Absorber Wrench

Fig. 35. Armstrong T-4 Shock Absorber Wrench, with Insets for Side View and Reverse Detail.

Fig. 35 shows an Armstrong T-4 shock absorber specialty wrench, stamped "U.S.A." with the Strong-Arm logo, with "Columbus Shock Absorbers" on the reverse.

The overall length is 8.4 inches, and the finish is nickel (or possibly chrome) plating.