Irwin Tools 1882786 SPEEDBOR Countersink Wood Drill Bit， Number-4 Replacement Bit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Tapered drill with widened flutes for drilling fast， clean pilot holes and ensures tight fit for screws</li><li>Adjustable four-cutter counter bore cuts and clears chips quicker for fast， smooth countersinking</li><li>Counter bore attaches to flats on shank with two hex screws for a secure fit and can be adjusted for controlled pilot hole depth</li><li>1/4" quick-change shank reduces slipping in standard chucks and is compatible with all 1/4" quick-change chucks， including impact drills</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31u0lPP5hZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21sJHg%2BXXcL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21EwpxldqCL.jpg" noproxy>