Richard: yuchengtools [at] Chrome Vanadium Steel Heat-Treated 1/4" Drive This Set Includes: (13) sockets : 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14mm (1) Quick-Release,72-Tooth Ratchet (2) Extensions : 50mm, 100mm (1) Flexible Shaft Attachment - 150mm (1) Spinner Handle - 150mm (1) Sliding Bar - 100mm (1) Universal Joint (1) 1/4"?/4" Hex To Square Adapter (4) Hex Keys : 1.27, 1.5, 2, 2.5mm (21) Bit Sockets -6 Square: 3, 4, 5, 6, 7, 8mm -3 Slotted: 4, 5.5, 7mm -3 Phillips: PH1, PH2, PH3 -3 Pozi: PZ1, PZ2, PZ3 -6 Torque: T10, T15, T20, T25, T30 (1) Blow Case