... Material:Carbon steel or CR-V; 27 PC Mechanics Tool Set:• 1/4 in Drive ratchet handle,carbon steel,heat ... treatment,chrome-plated• 9 SAE sockets 3/16, 7/32, 1/4, 5/16, 11/32, 3/ ... 8, 7/16, 15/32, 1/2,carbon steel,heat treatment ... ,chrome-plated,• 8 pc Hex key wrench SAE - 1/16, 5/64, 3/32 ... , 1/8, 5/32, 3/16, 7/32, 1/4,• 8 pc Hex key wrench Metric - 1.5, 2, ...