Kincrome 15 Piece Reversing Gear Spanner set. Forged from Chrome Vanadium Steel, hardened, tempered, chrome plated and polished with a light satin finish for corrosion protection. With 72 teeth, the strong fine gear ratcheting ring end needs as little as 5 degree of sweep to move fastener. The reverse switch eliminates the need to turn over the spanner when changing direction, allowing the user to complete a job faster . Set contains sizes: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24mm packed in roll up wallet.