40 Piece Pro Tech 3/8 in. Dr. Impact Socket Set

Powerbuilt Professional Technician impact socket sets are built to meet or exceed ANSI specifications. All sockets, socket accessories and drive tools are constructed of high-grade Chrome Molybdenum (Cr-Mo) steel with an industrial black phosphate finish. Powerbuilt sockets are the heart of these sets. The stealth black finish is enhanced with a laser-engraved size marking that won't rust or wear off - ever. Beauty is more than skin-deep though. Inside Powerbuilt sockets you'll find precision chamfered hex faces that make it easier to guide them onto fasteners. And the exclusive Z-Drive hex pattern grabs and turns the flat surfaces of those fasteners to reduce round-off and slipping.  Finally, the center holes are punched through to add a bit more clearance for taller nuts and bolts. Each socket is protected with a black phosphate finish for the highest degree of durability and corrosion resistance. Powerful, precise and stylish, Powerbuilt socket sets offer the look, feel and performa