Stanley Proto ultra-thin pump wrench line designed for use on hydraulic fittings
Service wrenches have been added to the ultra-thin, open-end wrench lines. Also called pump wrenches, they are similar to check nut wrenches, but have a satin finish, and their heads are set at a greater angle. Lighter than typical big wrenches, they're preferred for use on hydraulic fittings and other applications where high torque isn't needed. SKUs include 26 fractional and 21 metric sizes.