The Masterforce® 1-inch cobalt M35 industrial grade high-speed drill bit lasts ten times longer and provides superior, specialized performance. It holds its hardness in extreme high heat situations when drilling hard metal, heat-treated steel, and stainless steel. It is cryogenically hardened for drilling into the toughest materials, including stainless steel, cast iron, and other hard materials. The 135-degree split point drills on contact. The Silver & Deming bit has a 1/2-inch tri-flat shank and can be used with a drill or drill press with a 1/2-inch chuck.