Curve head design, chip removal, perforation is more efficient.Sharp edge,high hardness and accurate positioning. Can be used for wooden perforation, installation of spherical door tips, drawer tips, plastic products, wood, plywood, etc. Made from high quality alloy blade, sharper, more durable. Suitable for hand held electric drill,stand motor-driven drilling machine, impact drill,and mobile ribbon type magnetism drilling machine., Manufacturer: TOOLDO