Hardened and tempered for corrosion resistance. Contents: Combination Spanners with WallDrive Rings (x20), Stubby Combination Spanners with WallDrive Rings (x10), Double End Half-Moon Spanners with WallDrive Rings (x5), S-Spanners with WallDrive Rings (x5), Deep Offset Spanners with 12-point Rings (x5), Double Open-End Spanners (x5).