Chrome vanadium steel fully heat treated with wall drive sockets giving more torque and avoids damage to the nut. Satin chrome finish for durability. Quick release soft grip 72 teeth ratchet with spring loaded ball bearing in ratchet for secure fitment.Contents 18 x 6 point pro drive sockets 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 27, 30, 32mm. 6 x 12 point pro drives sockets 10, 12, 14, 15, 17, 19mm. Ratchet handle 5 & 10 , extension 3/8 x 1/2 adaptor. Extension bar and adaptor can be used as a sliding T bar 16 & 21mm plug sockets and universal joint.