Disk Teeth Knife is widely applied to adhesive products, protective films, all kinds of papers, fabrics, rubber tires, food and so on. Teeth of knife are sharp; Surface of teeth is smooth; Material of knife is suitable and durable. Detailed Paremeters: 1. Size (ODxIDxTmm): 200x25x2mm 2. Material: HSS 3. Hardness: 62-63HRC