12 point design means less wear on fasteners. CR-Mo Alloy Steel for long life. Packaged in heavy duty blow mold case. Fully Guaranteed Includes: Standard: 3/8, 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, 1-3/16, 1-1/4, 1-5/16, 1-3/8, 1-7/16, 1-1/2; Deep: 3/8, 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, 1-3/16, 1-1/4, 1-5/16, 1-3/8, 1-7/16, 1-1/2; 1/2 drive U joint.