Suitable for use in flammable environments. A block shape on one end of the handle is struck with a hammer to loosen or tighten a fastener.
- The opposite end has 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.
- These SAE (inch) size wrenches have a straight handle and a 6-pt.
- design that allows more contact with the fastener's sides than the 12-pt. style and prevents rounding the fastener's corners.