The Trend 2-Sided Diamond Bench Stone is the last diamond stone you will ever need to purchse. One side (300 grit) is for removing burs and nicks in your tools and the other side (1000 grit) is for fine tuning the edge prior to stropping. The perfect stone for the carver. It even sharpens the carbide tips on your Arbortech tools. The Trend Diamond Stone comes with a non-slip mat and an eraser to clean the stone for maxium life. We also recommend using the Trend Lapping Fluid to extend the life of the surface. 2" x 6" x 5/16"