The company's newly developed products use auger and drill bits for power tools, and can produce spiral drills, drill bits and spiral blades of various specifications according to customer requirements. The blade is made of carbon steel and 304 stainless steel. Welcome friends to call us to order. A drill bit is a tool used to drill a through hole or a blind hole in a solid material and to ream the existing hole. Commonly used drill bits mainly include twist drills, flat drills, center drills, deep hole drills and nest drills. Although reamer and boring drills cannot drill holes in solid materials, they are also customarily classified as drill bits.