Very handy, this cutter can cut stainless steel sheet, iron sheet, aluminum and copper sheet, etc. Double cutting heads are adjustable so you can cut in any direction you want Can be used for 8mm 1500 - 3000rpm electric drills or pneumatic drills With this cutter you can cut straight lines, curved lines, arched lines or many other irregular lines and shapes Portable and compact, suitable for car repair and maintenance and sheet metal production. Specification: Condition: 100 percent Brand New Material: plastic and metal Minimum. Cutting radius: 12 mm Maximum slice thickness: Iron sheet: 1.8 mm or 0.07 in. Stainless steel sheet: 1.2mm or 0.05 in. Copper, aluminum sheet: 2mm or 0.08in Plastic or fiberboard: 2mm or 0.08 in. Size: about 18 x 7.8cm or 7.09 x 3.07 inch Weight approx 463g Package included: 1 x metal nibbler Instruction: 1. The cutting edge should be oiled frequently, especially if you are using it to cut aluminum sheets. 2. Turn on the drill first, then cut, and after cutting, remove the cutter from the sheet metal first, and then turn off the drill. 3. Hold the cutting rod perpendicular to the sheet metal surface when cutting in case the cutting edge is broken.