Chrome vanadium steel for extra strength and durability. Ratchet with contoured handle for comfort and added torque. Chrome-plated sockets to resist rust. Metric. 6-point sockets for a snug fit. Laser-marked socket size on each socket for easy identification. 24 standard sockets: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 mm  5 accessories: Quick release ratchet, Extensions: 5" and 10", Universal joint, 3/8" drive adaptor (3/8" F x 1/2" M). Meets ANSI standards. 29 piece set.