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2. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   The hex socket screw drive has a hexagonal recess and may be driven by a hex wrench, also known as an Allen wrench, Allen key, hex key, or inbus as well as by a hex screwdriver (also known as a hex driver) or bit. Tamper-resistant versions with a pin in the recess are available.

3. Hex key - Wikipedia

   en.wikipedia.org/wiki/Hex_key

   The idea of a hex socket screw drive was probably conceived as early as the 1860s to the 1890s, but such screws were probably not manufactured until around 1910. Rybczynski (2000) describes a flurry of patents for alternative drive types in the 1860s to the 1890s in the U.S., [2] which are confirmed to include internal-wrenching square and triangle types (that is, square and triangular sockets ...

4. Allen (brand) - Wikipedia

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

   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". W.G. Allen [4] filed the first related patent in 1909 for its recessed hex-driven safety screws, [5] a safety improvement over ...

5. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   A lathe of 1871, equipped with leadscrew and change gears for single-point screw-cutting A Brown & Sharpe single-spindle screw machine. Fasteners had become widespread involving concepts such as dowels and pins, wedging, mortises and tenons, dovetails, nailing (with or without clenching the nail ends), forge welding, and many kinds of binding with cord made of leather or fiber, using many ...

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7. Screwdriver - Wikipedia

   en.wikipedia.org/wiki/Screwdriver

   Proper use requires that the screwdriver's tip engage the head of a screw of the same size and type designation as the screwdriver tip. Screwdriver tips are available in a wide variety of types and sizes (List of screw drives). The two most common are the simple 'blade'-type for slotted screws, and Phillips, generically called "cross-recess ...