Richard: yuchengtools [at] Chrome vanadium steel Heat treated Mirror polished This Set Includes: (1) 1/4" Drive 43-Tooth Ratchet (1) 1/4" Drive Spinner Handle (1) 1/4" Universal Joint (2) Extensions - 2", 6" (9) 1/4" Drive Shallow Sockets : 4, 5, 6, 7, 8, 9, 10, 11, 12mm (7) 1/4" Drive Deep Sockets : 6, 7, 8, 9, 10, 11, 12mm (1) Metal Box