6-point hex socket for maximum torque transfer to the face of the fastener. Precision cold forged, hardened and tempered chrome vanadium steel. Fully polished and nickel chrome-plated for durable corrosion resistance. Chamfered ends and thin walls for positive location on fastener and knurled band for grip. Contents: 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 7/16″ and 1/2″ AF. 6-point hex socket for maximum torque transfer to the face of the fastener. Precision cold forged, hardened and tempered chrome vanadium steel. Fully polished and nickel chrome-plated for durable corrosion resistance. Chamfered ends and thin walls for positive location on fastener and knurled band for grip. Contents: 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 7/16″ and 1/2″ AF.