Shapton RockStar Whetstone 8000 GritAccessories Information The Rockstar Series from Shapton improve on the GlassHR Series by removing the glass backing, and adding extra stone thickness for a longer lifespan. They are a hard stone that offers lighter feedback levels than other stones, but cut very fast, require no soaking, and are very slow to dish. Overall size: 210 x 70 x 10mm Micron: 1 Mesh: 8000