... Set 1.Material:Carbon steel or CR-V; 27 PC Mechanics Tool Set:• 1/4 in Drive ratchet handle ... 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, ...