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2. Allen (brand) - Wikipedia

   en.wikipedia.org/wiki/Allen_(brand)

   Originally named Allen Manufacturing Company, the business produced hexagonal set screws and wrenches to fasten them. The terms "Allen wrench" (American English, though "Allen key" is also common in the US) and "Allen key" (British English) [3] are derived from the Allen brand name and refer to the generic product category "hex keys".

3. Easco Hand Tools - Wikipedia

   en.wikipedia.org/wiki/Easco_Hand_Tools

   In 1990, the hand tool company was acquired by the brothers' Danaher Corporation. [4] This acquisition made the tools division the largest part of Danaher. [5] In 1991, Sears selected Danaher to be the exclusive supplier of Craftsman mechanic's tools. [6] In 2010, Danaher merged its tools division with Cooper Tools to form Apex Tool Group.

4. Hex key - Wikipedia

   en.wikipedia.org/wiki/Hex_key

   A hex key (also, hex wrench, Allen key and Allen wrench, Unbrako or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ().. Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets.

5. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   A hex screw drive uses six-sided fastener heads, and the fastener is known as a hex head cap screw. It can be turned with an adjustable wrench, combination wrench and 6- or 12-point sockets. The hex drive is better than square drive for locations where surrounding obstacles limit wrenching access, because smaller wrench-swing arcs can still ...

6. Spring pin - Wikipedia

   en.wikipedia.org/wiki/Spring_pin

   A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the diameter of the hole they are intended for, and a chamfer on either one or both ends to facilitate starting the pin into the hole.

7. Armstrong Tools - Wikipedia

   en.wikipedia.org/wiki/Armstrong_Tools

   Armstrong was founded in 1890 as the Armstrong Bros. Tool Company in Chicago, Illinois by the five Armstrong brothers. The brothers manufactured bicycle parts and tools for repairing and manufacturing bicycles from the brothers' backyard shed and managed a retail store in downtown Chicago.