DEWALT Drill Bit, Black Oxide, 7/16-Inch x 12-Inch (DW1612) Product Description The DEWALT Black Gold Metal Drill Bits feature a black and gold coating to prevent rust. The tapered web design of wood drill bits 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 drill bit features a 135 degree split point tip design to help reduce walking. From the Manufacturer 12-inch black oxide drill bits from DeWalt are ideal for drilling in hard to reach areas, in materials such as non-ferrous metal, wood, and plastic. Because of the wide variety of applications covered, 12-inch black oxide drill bits will be found in most residential and commercial tool boxes. 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.