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. Application Cuts 2" to 12" (5.1 to 30.5 cm) Hole in Ductwork Weight 14.2 oz (404 g)Special Features Adjustable Pivot Point for Accurate Hole Size Type Duct Hole Cutter Overall Length 7.2" (18.3 cm) Material Aluminum Alloy Overall Height 4.3" (10.9 cm) Overall Width 1.1" (2.9 cm) Bit Material Heat Treated Chromium Finish Black Powder Coated Bit Length 4.3" (109.2 mm) Cutting Pattern Circle Hole Diameter 2" to 12" (5.1 to 30.5 cm) Cutting Capacity 24 gauge Steel; 26 gauge Stainless Steel