Suitable for wood, plastic, compressed version, and forbidden to be used on iron plate, steel plate and glass. The drill bit is equipped with right-handed tapered self-tapping thread for accurate positioning. The sharpened wing head makes it easy to drill into wood. Self-tapping pilot screw design, convenient manual driving of wood spiral drill, saving manpower. characteristic: The cutter head is made of high-quality high-carbon steel, which is after high-temperature quenching. It is the perfect tool for any outdoor, , or camping enthusiast. Four-blade and four-groove design, smooth and light cutting, smooth chip removal and high efficiency., Weight: 0.54674640976 pounds, Manufacturer: Ehwisbe