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2. Socket wrench - Wikipedia

   en.wikipedia.org/wiki/Socket_wrench

   For example, a 1 ⁄ 4-inch to 3 ⁄ 8-inch adapter allows sockets with 1 ⁄ 4-inch drive holes to attach to a 3 ⁄ 8-inch ratchet, and so on. Universal joints are two articulated socket joints (about 1 inch (25 mm) long) combined at a right angle, that allow a bend in the turning axis of the wrench and socket.

3. Impact wrench - Wikipedia

   en.wikipedia.org/wiki/Impact_wrench

   A 1/2" drive pistol-grip air impact wrench. An impact wrench (also known as an impactor, impact gun, air wrench, air gun, rattle gun, torque gun, windy gun) is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it suddenly to the output shaft ...

4. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   The groove is made by cold-forming (or machining) a groove at the end of a pipe. A gasket encompassed by coupling housing is wrapped around the two pipe ends, with the coupling engaging the groove; the bolts and nuts are tightened with a socket or impact wrench. The installed coupling housing encases the gasket and engages the grooves around ...

5. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   1 ⁄ 8: 3.2: 2 5 ⁄ 32: 4.0: 3 3 ⁄ 16: 4.8: 4–5 ... or 8- or 12-point [67] sockets. Common in the 19th and early 20th centuries, when it was easier and cheaper ...

6. Universal joint - Wikipedia

   en.wikipedia.org/wiki/Universal_joint

   [7] [8] [9] He published a description in 1678, [10] resulting in the use of the term Hooke's joint in the English-speaking world. In 1683, Hooke proposed a solution to the nonuniform rotary speed of the universal joint: a pair of Hooke's joints 90° out of phase at either end of an intermediate shaft, an arrangement that is now known as a type ...

7. Ratchet (device) - Wikipedia

   en.wikipedia.org/wiki/Ratchet_(device)

   Animation of ratchet gear (green) and pawl (pink). Red arrows indicate which way force is applied to the gear. A ratchet featuring a gear (1) and pawl (2) mounted on a base (3) Animation of ratchet gear rack (green) and pawl (pink).