Rockwell, Sonishear Accessory, Harden Steel Blades, Shearing Blades Operates At Up To 20,000 SPM & Can Cut Materials Up To 5/16" Thick, Ideal For Cutting Paper, Plastic Packaging, Cardboard, Leather, Canvas, Carpet, Wallpaper, Thin Wire, Netting, Flowers & Stems, Rubber Matting & More, Attachment For Use With The Sonicrafter Oscillating Tool.