Why Do They Call It A Monkey Wrench?

A Monkey Wrench is so named because its adjustable jaw resembles the gripping claws of a monkey. The device was invented by Charles Moncky in the early 19th century and quickly became a tool of choice for builders, mechanics, and others.

It allowed them to quickly tighten and loosen nuts and bolts of variable sizes – something that was difficult with conventional wrenches of the period.

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