Chrome vanadium alloy steel for strength and long life; Triple chrome plating and ultra smooth high polish finish for added life; Meets and exceeds US federal standards for strength and performance; The Evercraft socket set is a complete collection of most frequently used sockets and accessories. Standard SAE socket sizes: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2, & 9/16 in; Deep SAE socket sizes: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2, & 9/16 in; Standard metric socket sizes: 4, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14, & 15 mm; Deep metric socket sizes: 4, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14, & 15 mm; UNSPSC: 27111703