Zandstra Foss Duo Diamond Sharpening Stone

Our hardest, sharpest, longest-lasting double-sided sharpening stone made of industrial diamonds. Large 10-by-3 inch sharpening surface makes it easy to keep the stone in precise alignment with your skate blades. Begin sharpening with the Coarse surface (37 microns / 400 grit) and then switch to the Fine side (10 microns / 1200 grit) to polish the gliding surface and minimize friction.Each diamond plate is held onto the base by a set of magnets. You can use a screwdriver to pry the plate off the base for cleaning and/or replacing, making our Diamond Stone a tool that will last a lifetime.