TEKTON 15-PC. 1/2"-DEEP IMPACT SOCKET SET features: Drop Forged, Heat Treated Carbon 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, 14-pc. 1/2"-Dr. Sockets (Metric): 11, 12, 13, 14, 15, 17, 18, 19, 21, 22, 24, 27, 30, 32, 1-pc. Molded Plastic Case.