6Pcs Hex Shank HSS Combination Drill and Tap Bit Set Drill Bit &amp; Screw Tap Deburr Countersink Bit 6-32NC 8-32 NC 10-32 NC 10-24 NC 12-24 NC 1/4-20 NC， Set of 6<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>100% brand new and high quality. High hardness， rustproof， solid and durable.</li><li>Complete hole drilling， tapping， deburring and countersinking in one operation with power drill saves labor and time</li><li>Fast replacement composite cone， uses drill edged principle.</li><li>Self-centering point， do not need assistant center drilling or center punching.</li><li>Back tapered beyond tap to prevent thread damage from over-drilling.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/513kKAfX9VL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51cu7E3w5kL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51qBLLtERqL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31um4fyH%2B2L.jpg" noproxy>