Torqueplus fastening system drives off fastener body, more easily removing damaged fasteners. Reduces risk of fastener rounding. Applies more torque to fastener. Unique arc design increases surface contact. Anti-Slip Design (ASD) wrench has a locking groove prevents slippage and knuckle injury. Shank is positioned at the center of box end, reduces the tendency of the wrench to cock.SEPTLS5771228ASD. TLS5771228ASD. Proto Proto Torqueplus 12-Point Combination Wrenches - Satin Finish - 1228ASD.