Greenlee DTAP1/4-20 Combination Drill and Tap Bit， 1/4-20NC<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Complete hole drilling， tapping， deburring and countersinking in one operation with power drill saves labor and time</li><li>Back tapered beyond tap to prevent thread damage from over-drilling</li><li>Deburr/countersink also provided on bit beyond back taper</li><li>Made from hardened high-speed steel vs carbon steel for longer life</li><li>Designed to tap up to 10-gauge metal</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21iuLslIpJL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41IKujhdSnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51-HAxwNWEL.jpg" noproxy>