<br>Complete hole drilling, tapping, deburring and countersinking in one operation with power <br>drill saves labor and time <br>Back tapered beyond tap to prevent thread damage from over-drilling <br>Deburr/countersink also provided on bit beyond back taper <br>Made from hardened high-speed steel vs carbon steel for longer life <br>Designed to tap up to 10-gauge metal <br>6-32NC (3.5mm), 8-32NC(4.2mm), 10-32NC(5mm), 10-24NC (5mm), 12-24NC(5.7mm), 1/4-20NC(6.35mm) <br>Package include: 6pc tap drill bits