DEWALT Black & Gold Metal Drill Bits feature a black and gold coating to prevent rust. The tapered web design provides extreme durability to resist breakage. The bits feature a 3-flats shank to reduce spin-out in the chuck. Black & Gold metal drill bits are made of heavy-duty High Speed Steel for drilling into a variety of materials including plastic， wood， and metal. Each bit features a 135° split point tip design to help reduce walking.