Titanium HSS Step Drill Bits Set with 1/4-Inch and 3/8-Inch Shanks By Rioa， SAE， 5-Piece with Aluminum Protective Case</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Titanium Step Drill Bit Set from high quality M2 steel comes with Aluminum case and Tri-flat shank</li><li>High speed steel Tri-flat shank design for sure grip for improved performance</li><li>Titanium nitride cobalt coating adds a hard layer for a lifetime guarantee of fast cutting speeds</li><li>Two-flute design sizes 1/4，3/8，1/2，5/8，3/4. Automatically deburrs holes as you drill</li><li>High Speed Steel Countersinks are milled and precision ground to 82</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51VGTiPVtdL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51Vd14-PbyL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41ccSnK6r0L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51t8nTpjxwL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41h3WaV--4L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41YCwHEoDUL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41ZWWSHutUL.jpg' noproxy></br>