DEWALT Drill Bit, Black Oxide, Reduced Shank, 7/8-Inch to 1/2-Inch (DW1627) Product Description The 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 wood drill bits feature a 3-flats shank to reduce spin-out in the chuck. Black Gold metal drill bitst are made of heavy-duty High Speed Steel for drilling into a variety of materials including plastic, wood, and metal. Each drill bit features a 135 degree split point tip design to help reduce walking. From the Manufacturer Reduced shank black oxide drill bits from DeWalt are ideal for drilling holes larger than 1/2-inch with a standard 1/2-inch drill. These bits can be used in general applications including drilling in non-ferrous metal, wood, and plastic. Typically, the larger sizes are used in metal. Features 135-degree split point tip of the drill bit is designed to help reduce walking High Speed Steel of DEWALT drill bits is made to be used in plastic, wood, and metal Tapered web design for extreme durability and resisting breakage of drill bits for wood Black and gold coating to help prevent rust and wear 3-flat shank to reduce spin-out in the chuck Size markings on the drill bit shank to identify sizes quickly 135 degree split point drills on contact and prevents walking Parabolic flute design improves chip ejection in metal and wood drilling applications Black oxide coated for greater wear resistance Helix is 31 degrees which minimizes the over aggressiveness of a true parabolic flute One year warranty, One year service contract, 30 day no-risk trial USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.