TEKTON 12-PC. 1/2"-DRIVE DEEP IMPACT SOCKET SET features: Drop Forged, Heat Treated Chrome Vanadium Steel Construction, Opti-Drive Socket Design Contacts Only Flat Surfaces of Fastener Head to Eliminate Rounding Off Corners, 6-Point Socket End with Beveled Nose to Help Guide Socket Onto Fastener, Durable Black Oxide Finish Resists Corrosion, Hole on Socket Locks on to Drive Tang v Keeps Socket from Slipping Off or Sticking to Fastener, 11-pc. 1/2"-Dr. Sockets (SAE): 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1", 1-pc. Molded Plastic Case.