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  2. Watts Brothers Tool Works - Wikipedia

    en.wikipedia.org/wiki/Watts_Brothers_Tool_Works

    Watts Brothers Tool Works is a tool manufacturer located in Wilmerding, Pennsylvania. They are known for manufacturing drill bits that can drill square holes, [1] [2] including blind holes, which cannot be made with other methods such as broaching. The Harry Watts square drill bit is based on a Reuleaux triangle shape. It is used together with ...

  3. Watts Brothers Tool Works; Werner Co. Westcott Rule Company; Western Forge; WORX; X. Xcelite This page was last edited on 7 June 2018, at 22:50 (UTC). Text ...

  4. North Brothers Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/North_Brothers...

    Originally focusing on spiral ratchet and "plain" screwdrivers they soon expanded to various types of hand tools and eventually became a significant force in the tool industry. Eventually the success of the Yankee line of tools led the Stanley Works tool company to acquire the North Bros. in 1946, chiefly to improve their own product lines.

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  6. Hughes Tool Company - Wikipedia

    en.wikipedia.org/wiki/Hughes_Tool_Company

    Hughes Tool Company was an American manufacturer of drill bits. Founded in 1908, [1] it was merged into Baker Hughes Incorporated in 1987.

  7. Reuleaux triangle - Wikipedia

    en.wikipedia.org/wiki/Reuleaux_triangle

    The Watts Brothers Tool Works square drill bit has the shape of a Reuleaux triangle, modified with concavities to form cutting surfaces. When mounted in a special chuck which allows for the bit not having a fixed centre of rotation, it can drill a hole that is nearly square. [33]

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