The Klein Tools Hole Cutter will cut 2-Inch to 12-Inch (51 to 305 mm) holes in up to 24 gauge steel and 26 gauge stainless steel. Inch and centimeter measurement scales are molded into the body for accurate hole diameters. Quality bearings assure a long cutting life. This versatile hole cutter installs into standard electric drill chucks. Includes a replacement bit and a L-Style Hex-Key to tighten the bit.