1. Made of high-quality plastic and diamond, strong and durable, lightweight and non-slip. Thin roller for better, more consistent sharpening effect. 2. To make the skates sharper, simply move it lightly. Coarse grinding and fine grinding are easy to operate, wear-resistant, with rotating grinding stone. Durable design, suitable for flower knife or ball knife use. 3. Fine grindstone for daily maintenance and polished blades, polished with a detailed diamond rod. Fix the skates and move back and forth with the grindstone rod. 4. Coarse grindstone for initial sharpening, fix the skates and shape the cutting edge using the rough diamond grinding rod by moving it back and forth. 5. The portable size fits most ice blade widths without affecting clearance or radius. Adjustable design makes it suitable for most ice hockey skates and figure skating blades. Easy to carry with a rope and included storage bag; the fish-shaped design is cute and comfortable to hold.