Greenlee 6-Piece Metric Drill / Tap Set, DTAPKITM. Complete hole drilling, tapping and deburring/countersinking in one operation with power drill saves labor and time. Back tapered beyond tap to prevent thread damage from over-drilling. Deburr/countersink also provided on bit beyond back taper. Made from hardened high-speed steel vs. carbon steel for longer life. High quality hex shank to ensure strong connection to drill chuck. Designed to tap up to 10-gauge metal. Quick change adaptor included in both metric and standard kits. DTAPM3C M3 x 0.500 Drill/Tap Bit, DTAPM4C M4 x 0.700 Drill/Tap Bit, DTAPM5C M5 x 0.800 Drill/Tap Bit, DTAPM6C M6 x 1.000 Drill/Tap Bit, DTAPM8C M8 x 1.250 Drill/Tap Bit, DTAPM10C M10 x 1.500 Drill/Tap Bit.