Ck sure drive wrenches ck tools t4365 150 manufactured from high quality chrome vanadium the ck sure drive adjustable wrenches features jaws which are specially machined to grip on the flats of a nut rather than over the corners this avoids rounding off the wrench offers extra capacity and better access with slim jaws that open 18 wider than standard patterns the jaws have metric and imperial graduations for accurate pre setting and the handle has a soft grip for comfort and control