Skatemate pro ice skate sharpenerhand held skate sharpenerquick and easy to use simply slide along runnerimmediately adjustable to fit all skate blade widths and hollowsskatemate has a patented flexible 120 grade abrasive sharpening cylinder that sharpens with respect to the runner39s radiusthe special ceramic embedded abrasive used in skatemates cylinders is the second hardest material on the face of the earth only pure diamond is harder internal teflon glide strips provide for a smoot