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Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.
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The company has a tool line of over 3,500 items including wrenches, ratchets, screwdrivers, tool boxes and air tools. In 2021, SK was acquired by Hangzhou GreatStar Industrial . Jay Leno described the company as "an iconic American brand for decades," [ 2 ] and the company is known for inventing the round-head ratchet wrench .
socket clamp ratchet wrench: clamp ratchet spanner An open-ended multi-size ratchet wrench. The ratcheting mechanism allows the nut to be clamped on or loosened with a reciprocating motion; flip the wrench to change the direction of the drive. The wrench takes the advantage of the clamp action to allow multiple sizes in both SAE and metric ...
A square screw drive uses four-sided fastener heads which can be turned with an adjustable wrench, open-end wrench, or 8- or 12-point [67] sockets. Common in the 19th and early 20th centuries, when it was easier and cheaper to manufacture than most other drives, it is less common today (although still easy to find) because the external hex is ...