PREMIUM QUALITYMade of qualified plastic and diamond, strong and durable, lightweight and nonslip. Thin roller for better, more consistent sharpening effect. IDEAL DESIGNTo 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. WIDTH ADJUSTABLEIt 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 fishshaped is cute and easy to hold. SIMPLE TO USEFine grindstone for daily care and polished blade, polished with a detailed diamond rod, fixed skates and moved back and forth with a grindstone rod. WIDELY USEThe portable sized sharpener fits the width of most ice blades without affecting the clearance or radius of the blades. Coarse grindstone, after the skates are fixed with rough diamond cutting edge, the rough diamond grinding rod is moved and polished back and forth.