Forged from the finest chrome molybdenum alloy steel - the best choice for strength and durability. Radius corner design - to extend the life of fasteners. Ideal for working in tight areas. Included in a heavy duty blow molded case. Fully guaranteed No doubt, Sunex tools offer one of the most complete and toughest Impact Socket lines around. This 1/2 drive, 6 point deep impact socket set is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job. Also each socket features a radius corner design, causing the socket to grab the sturdy wall of the fastener instead of grabbing the corners, resulting in less wear on the fastener. Set includes: 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8 and 1-1/4 deep sockets; 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm, 26mm and 27mm sockets; and 2 deep flip sockets: 3/4 x 13/16 and 19mm x 21mm..