SKILCRAFT® Pro-Grade socket sets are made of high-grade chrome nickel steel. Sockets feature lobular openings for greater turning power without deforming the fastener. Designed for quick engagement on both 6 and 12-point fasteners. Included accessories feature unique finger fit handles, narrow pear-shaped head on socket wrench heads for ease of access into confined work areas, ball and spring socket retention, and a high polish chrome finish for easy cleaning. Sockets come in custom foam trays for easy toolbox organization. Limited lifetime warranty. 13 piece set includes, 12 point 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16" and 1" deep sockets.