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Adjustable/crescent spanner/wrench

A wrench (spanner in British English) is a tool used to turn nuts and bolts, and similarly shaped objects.

Some types of wrenches are:

Special wrenches[change | change source]

An adjustable spanner, or adjustable wrench, or crescent wrench in American English, is a tool. It may move its jaw to rotate nuts or bolts of different sizes. It was invented by Edwin Beard Budding (1795-1846), who also invented the lawnmower.

An open end spanner or open end wrench is a tool used to turn nuts.