Drive Size: 1/2 Inch Material: Cr-V (Chrome Vanadium) Steel Finish: Heat Treated, Chrome Plated Set Includes: Sockets (1/2″ Drive): 18 Pieces – 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 30, 32 Mm Extension Bars (1/2″ Drive): 1 X 125 Mm 1 X 250 Mm Sliding T-Bar (1/2″ Drive): 1 X 250 Mm Universal Joint (1/2″ Drive): 1 Piece Spark Plug Socket (1/2″ Drive): 1 X 21 Mm Quick Ratchet Handle (1/2″ Drive): 1 Piece