SkateMate® can sharpen stainless steel or super-steel blades, and super-hard speed skate blades * Easily adjustable to fit all skate blade widths and ROH (Radius Of Hollow) * The flexible abrasive cylinder has a high-tech ceramic abrasive. The abrasive grains of this material are ceramically bonded to the backing to prevent wear grooves from forming * The Teflon® strips provide a smooth sliding action up and down your blade