The BlueSpot Tools Drill & Tap Set is manufactured from hardened steel for increased hardness and a clean thread Includes a range of common tap sizes and the drill bit required for that size of thread Suitable for use with plastics (use distilled water as coolant), steel, aluminium and other non-ferrous metals Supplied in a metal tin for easy access and storage Contains: 7 x Drills: .5, .3, .2, 5, .8, .5, 1.2mm 7 x Taps: M3, M4, M5, M6, M8, M10, M12 1 x Tap Wrench