The removable and reversible stainless-steel nut driver shank works for 1/4" and 5/16 hex fasteners perfect for hose clamps and as a power nut-driver in a drill. The alloy hex bolster adapts to a 7/16 wrench to increase torque for stubborn screws. Look to the seven power bits to suit practically every need, as well as the solid handle design for maximum comfort and torque.