Morris Products 13886 Selfeed Bit, 1-5/8" Size Self-Feed Bits - This Self-Feed Bits for Drill provides clear cutting without effort. Self-Feed Bits for Drill Cuts Faster & Has Improved Balance with Reduced Runout Shanks Have Flat Surfaces for Secure Chuck Grip Feed Screws Removable & Replaceable Feed Screw Provides Fast, Effortless Feeding Even in Gummy Wood