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.

Mechanical Wrench Tool

A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn…

"In order to get the best results from the tool the pressure on the handle should always be in the direction of the arrow shown above the latter, so as to put the pressure on the jaws at the points B and C, and not at D and E." —Grimshaw, 1902

Adjustable Wrench

"In order to get the best results from the tool the pressure on the handle should always be in the direction…

Adjustable wrench that has one fixed and one adjustable jaw.

Adjustable Wrench

Adjustable wrench that has one fixed and one adjustable jaw.

A wrench is a tool used to provide a mechanical advantage in applying torque to turn bolts, nuts, or other items designed to interface with a wrench.

Mechanical Wrench

A wrench is a tool used to provide a mechanical advantage in applying torque to turn bolts, nuts, or…

An adjustable wrench for gripping and turning a pipe.

Pipe Wrench

An adjustable wrench for gripping and turning a pipe.