•Non-reflective ProtoBlack™ finish for use where non-plated products are required. •12 point box end allows for fine indexing, helping improve speed and access. •Designed for heavy use in close quarters where hammer or sledge is required to loosen frozen nuts or set large fasteners. •High strength rectangular design withstands heavy sledging; transmits power more effectively to fastener. •Box opening designed to remain in place on fastener when wrench is struck. •Heavy box walls provide greater transmission of torque to fastener. •Straighter handle design than striking wrenches resists springing, nut turns easier.