A dedicated socket wrench used for fitting spark plugs.

Related Terms

TORQUE WRENCH

Wrench with adjustable torque limit. Used to ensure even and uniform tension is applied while tightening.

ADJUSTABLE WRENCH

A wrench with one jaw which is fixed and another which is adjustable; the size is adjusted by a knurled screw.

ALLEN WRENCH

A wrench made from a straight or bent hexagonal rod, used to turn an Allen screw.

ALLIGATOR WRENCH

A wrench having fixed jaws forming a V, with teeth on one or both jaws.

BOX WRENCH

A closed-end wrench designed to fit a variety of sizes and shapes of bolt heads and nuts.

COMBINATION WRENCH

A wrench that is an open-end wrench at one end and a socket wrench at the other.

CONSTRUCTION WRENCH

An open-end wrench with a long handle; the handle is used to align matching rivet or bolt holes.

STILSON WRENCH

A STILSON wrench used to clamp and fasten on round or worn surfaces. It finds its grip and is self-locking but leaves marks on the surface. Not to be used on nuts in good condition.
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HEXAGONAL-HEAD BOLT

A standard wrench head bolt with a hexagonal head.

IMPACT WRENCH

A compressed-air or electrically operated wrench that gives a rapid succession of sudden torques.

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