Features: This cutter can cut sheet metal including steel, copper, aluminum and stainless steel sheet metal, for both flat and curved surfaces. Double head design allow you to continue cutting with the other cutting edge when one side is dull. With this cutter, you will be able to cut out straight line, curve line, arc line or many other irregular lines and shapes. The cutter can be used on 8mm 1500~3000RPM electric drills or pneumatic drills. The cutting edge direction is adjustable in 360 degrees. Specifications: Min. Cutting Radius: 12mm Maximum Cutting Thickness: Iron Sheet: 1.8mm Stainless Steel Sheet: 1.2mm Copper, Aluminum Sheet: 2mm Plastic/Fiberboard: 2mm Instruction: 1. The cutting edge should be oiled frequently, especially when you use it for cutting aluminum sheet metal. 2. Switch on electric drill first, then cut, and after cutting, move cutter away from sheet metal first then shut off electric drill. 3. During cutting, keep the cutting rod vertical to the sheet metal surface, in case of a broken cutting edge. Package Includes: 1 set x Metal Sheet Cutter Kit Note: Pay attention to the maximum cutting thickness of different sheet metals, please. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.