COARSE: 240 Grit - Start with the Black 240 grit to remove large dings and side edge damage. MEDIUM: 500 Grit - Use this diamond to create a sharp side edge and fine tune any edge damage. FINE: 1000 Grit - Really bring out the shine and fine polish with the 1000 grit diamond. This will ensure a very smooth and professional edge finish, essential to carving the snow and ice. COMPATIBLE: Can be used as replacement files for Demon's Elite X Ski and Snowboard Side Edge Tool. Diamond Stone Measurements: 2.75 in. X 1 in. TRUST: Trust in Demon United. Our products are designed by winter sports enthusiasts in the USA and backed by our Quality Warranty.