From the Manufacturer
Stanley Proto combination wrenches are engineered to be more efficient and stronger than ever. Proto engineers continually work to create wrenches that grip tighter and let users apply more torque without fear of fastener damage. All are coated or plated to be durable and corrosion resistant.
Product Description
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.