1202 Hook coupling wrench

The wrench is a commonly used installation and removal tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threads to hold the openings or sleeves of bolts or nuts.This kind wrench is made from beryllium copper or aluminum bronze.

The wrench usually has openings or sleeve holes for holding bolts or nuts at one or both ends of the handle. When using the wrench, an external force is applied to the handle along the direction of thread rotation to turn the bolt or nut.

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