Selection of high-quality alloy blade, blade make more and , it is head to take bow curved, advantageous for chip removal, perforation is more efficient. Used for wood perforation, spherical tip installation door, drawer tip, plastic products, wood, plywood, etc, Trepanning smoother, less noise. edge, high hardness, precise positioning, high , smooth cut, impact strength, high toughness. Enable woodworkers to drill holes without having to drill through the material when a clean and precise down on a hole. Suitable for handheld drill, stand motor driven drill and mobile band type magnetism drill., Manufacturer: Littimoon