Norseman Prem. 4pc S & D Drill Bit Set features a 1/2" reduced shank Magnum Super Premium design with black and gold 3-flats on the shank for a heavy-duty, 135-degree split point. Made from hi-molybdenum tool steel with a one-piece solid construction, this drill bit set exceptional durability and performance. The body and areas are gold surface treated to maximize lubricity, enhancing efficiency during use. These drill bits are for work hardening grades of stainless steel and other hard metal drilling applications, making them i for tough jobs. Please note that the drill bit pictured matches the specifications for this product line but may not represent the exact dimensions or shape of each specific bit. For more details, you can contact a store associate or call 330-877-3631. Model Number: