FeaturesFaster, more accurate drilling - center feed screw pilots the bit and allows the bit to pull through fastClean holes - two inside cutting plane shaves the hole radius for clean, smooth holes without pressureLong lasting performance - bits are resharpenable, feed screws and arbor are replaceableCoated with a rust inhibitorRemovable, replaceable feed screw draws the bit into the gummiest of woods effortlessly3/8 in min chuck size