The Blue Spot Tools 15 PCE Drill and Tap Set (M3-M12) is manufactured from hardened steel for increased hardness and a clean thread. The set includes a range of common tap sizes and the drill bit required for that size of thread. The set is suitable for use with plastics (use distilled water as coolant), steel, aluminium and other non-ferrous metals. The set is supplied in a metal tin for easy access and storage. Manufactured from hardened steel for increased durability Suitable for use with steel, aluminium and other non-ferrous metals Supplied in metal tin PACKAGE CONTENTS Drills: 2.5, 3.3, 4.2, 5, 6.8, 8.5, 10.2mm, Taps: M3, M4, M5, M6, M8, M10, M12, Tap wrench