The Strend Pro sheet metal cutting attachment is designed for mounting on a cordless, electric, or pneumatic drill. Using the attachment, it is possible to cut or make cutouts in sheets of steel, stainless steel, copper, aluminum, or plastic panels. The attachment is not suitable for cutting bent, corrugated, welded, or specially shaped sheets, nor other non-metallic materials. Maximum material thicknesses: iron 0.2-1 mm, steel 0.2-0.8 mm, copper and aluminum 0.3-1.2 mm, stainless steel 0.2-0.5 mm. Shank: 1/4".