HHIP 14 Piece M3. M10 High speed steel 3-in-1 tap/drill kit. Complete hole drilling, tapping, deburring and countersinking in one operation with power drill saves labor and time. Can be used to tap up to 10 guage steel, copper, brass, aluminum and plastic. Back tapered design helps prevent thread damage from over-drilling. One-piece drill/tap assures proper drill for tap size. Made of high speed steel for longer life. Includes 6 combinaition drill, tap and countersinks, 1 high torque tested quick-change adapter, 6 quick change CRV steel bits and a case. Thread range is M3 X 0.5, M4 X 0.7, M5 X 0.8, M6 X 1.0, M8 X 1.25 and M10 X 1.5. CRV bits are Slot3, Slot4, PZ1, PZ2, PH1 and PH2.