3/8” drive. Includes 3/8" drive ratchet handle, 6" extension, 3" extension, regular metric sockets: 9, 10, 12, 13, 14, 15, 17, and 19, deep metric sockets: 12, 13, 14, 16, and 17, regular SAE sockets: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, and 3/4", deep SAE sockets: 7/16, 1/2, 9/16, 5/8, and 11/16" plus a 13/16" spark plug socket. Carrying case.