Ideal for drilling a 4 5/8 Inch mortise hole into your log. Self feed bits cut faster, have improved balance with reduced run out. Inside cutting plane shaves hole radius for clean, smooth holes without pressure.
A removable, replaceable feed screw draws the bit into the gummiest of woods effortlessly. A hex shank provides a secure gripping surface for the drill chuck. The bit is coated with a rust inhibitor.