Wrench
Videos
A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts—or keep them from turning.
A set of metric spanners or wrenches, open at one end and box/ring at the other. These are commonly known as “combination” spanners.
Wheel-lock gun of Sigismund III Vasa: The original spanner had a square hole for turning the shaft (r.) of the wheel, which tensioned the mainspring. See also § External links.
Clé plate
Bremsleitungsschluessel
Socket wrench
Videos
A socket wrench is a type of spanner 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.
Wrench
…can also be used to hold workpieces in place for welding or drilling. In British English known generically by its brand name Mole Wrench adjustable socket wrench socket wrench socket spanner A closed cylinder that fits over one end of a nut or bolt head. It may include a handle, if it does not then it is often…
Socket set with ratchet (above), four hex sockets and a universal joint
Torx socket
"6 point" hexagonal socket
Splined socket