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PROTOHD050M
Striking box-end wrenches have an offset handle that allows access to fasteners in tight spaces. They have a block shape on one the end of the handle that is struck with a hammer to loosen or tighten a fastener. Wrenches are metric with an opposite end having an enclosed head end (box end) that fits around the entire head of the fastener for a more secure grip while turning compared to an open end.