ITEM NAME:Professional Sheet Metal Cutting Nibbler Round Description: Adjustable Cuts (51-305mm)holes in sheet metal including up to 20 gauge galvanized steel. Commonly used by HVACR and Roofing Professionals. Combination English/Metric diameter gauge. High-speed bearings assure perfect cutting balance and a long cutting life. Installs into the chuck of a standard electric dill as small as 1/4-lnch. Specification: Material: Carbon Steel Size Approx 185x110mm/7.3x4.3inch Package Includes: 1 set sheet metal hole cutter SKU: DMO0013022559032404.Installs into the chuck of a standard electric dill as small as 1/4-lnch. High-speed bearings assure perfect cutting balance and a long cutting life. Material: Carbon Steel. SKU: DMO0013022559032404.