Milwaukee 1" S&D Black Oxide Drill Bit is engineered for superior performance in a variety of materials ranging from low to high tensile strength, including stainless steel and cast iron. Crafted from premium industrial-grade steel, this Thunderbolt® Silver & Deming drill bit features heavy-duty cutting surfaces that deliver fast and efficient drilling through both deep and shallow holes. Its specially designed flute geometry enhances strength and improves chip ejection, ensuring smooth operation. The drill bit also boasts a robust 135-degree split point for easy penetration and a 1/2 inch reduced shank with three milled flats to prevent slippage in a jawed chuck. Each drill bit comes individually packaged for convenience and protection. Model Number: 48-89-2754