Features and Benefits: 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 molded storage tray Fully guaranteed No doubt, Sunex tools offer one of the most complete and toughest Impact Socket lines around. This 1/2" drive, universal 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: 1/2", 9/16", 5/8", 11/16", 3/4", 13/16' and 7/8".