Proto Slugging Wrench, Alloy Steel, Black Oxide, Head Size 41 mm, Overall Length 10", 45 °

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. The 12-pt. design has additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench.