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: 2.5, 3.3, 4.2, 5, 6.8, 8.5, 10.2mm 7 x Taps: M3, M4, M5, M6, M8, M10, M12 1 x Tap Wrench