Irwin Tools 42936 4-Inch Extension Bore<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>N/A</li><li>Imported</li><li>Brad Point to Start Holes Cleanly</li><li>Sharp cutting edge for smooth holes</li><li>Reduced shank fits 3/8-Inch and larger drills and drill presses</li><li>manufactured to exacting tolerances</li><li>Produces Flat Bottom Holes</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31I-%2BA3njiL.jpg" noproxy>