Convenient when drilling holes in thin iron plates (thickness 0.04 inch (1 mm) or less) with an electric drill.
You can use the screwdriver bit without removing it from the electric body. Smooth replacement
Please tighten the hex screw when the drill is not cut or empty it around. If it still has a bad cut, please feel good with the drill. When replacing the drill, it may be slightly adhered to the main unit, so please replace with a drill with pliers. When inserting a new drill, please insert it deep and tighten the hex screw