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A socket adapter is a device that allows a socket with a certain drive size to be used with a wrench or a power tool with a different drive size. For example, a socket adapter can be used to adapt a socket with a 1/4-inch square drive for use with a wrench with a 3/8-inch square drive. Socket adapters can have different shank types, such as hex shank or quick-change hex shank, that fit into different types of wrenches or power tools.
Socket adapters can also have different features and functions, such as: