Chrome vanadium steel. Includes 1/4” drive sockets: A/F 5/32”, 3/16”, 7/32”, 1/4", 9/32”, 5/16”, 11/32”, 3/8”, 13/32”, 7/16”, 15/32”, 1/2" and 17/32”. Metric: 4, 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, 10, 11, 12 and 13mm. Bi-square: 1/4", 5/16” and 3/8”. 3/8” drive sockets: A/F 9/16” and 5/8”. Metric 14, 15, 16 and 17mm. 1/4" - 3/8” adaptor, 3/8” extension bar. Spin disc. Soft-grip ratchet handle 3/8” drive. Storage case.