1、Made of qualified plastic and diamond, strong and durable, lightweight and non‑slip. Thin roller for better, more consistent sharpening effect. 2、To make the skates sharper, it is so simple to move lightly. Coarse grinding and fine grinding is easy to operate, durable wear resistance, coarse/fine grinding, grinding stone can be rotated. Durable, flower knife/ball knife can be used. 3、Fine grindstone for daily care and polished blade, polished with a detailed diamond rod, fixed skates and moved back and forth with a grindstone rod. 4、Coarse grindstone, after the skates are fixed with rough diamond cutting edge, the rough diamond grinding rod is moved and polished back and forth. 5、The portable sized sharpener fits the width of most ice blades without affecting the clearance or radius of the blades. It is adjustable makes it suitable for most ice hockey skates and figure skating blades. It's easy to carry with a rope and a nice storage bag, and the fish‑shaped is cute and easy to hold.