These drill bits are selected from metal and are not easy to wear Countersink feature allows for smooth and precise drilling, achieving clean and professional result With depth stop, the included depth stop ensures accurate drilling depth, making it easy to get consistent and precise holes Designed for woodworking projects, these drill bits are perfect for creating clean and precise holes in wood These drill bits are designed with a hexagonal shank, providing a nonslip grip,any slipping or shaking during drilling, Manufacturer: ERRORY