ITEM NAME:240, 360, 500, 1000 Grit Sharpening Stone Ice Snowboard Sharpener Set L Description: Portable 4pcs Sharpening stone set, great for Remove the excess burr from the ski base, use for a day to day sharpening of your ski or your snowboard. 240 Grit(Black): Use for removing case hardening from rock damage. 360 Grit(Blue): Use for deburring steel sides on skis and snowboards or for addressing minor rock damage. 500 Grit(Pink): A must have diamond to maintain a smooth and sharp edge; starts to bring out that high polish shine. 1000 Grit(Green): Final diamond polish when looking for that mirror finish; extremely exact edge accuracy; used on and snowboard skis to achieve that super smooth finish. Specification: Material: Diamond Color: As Picture shown Grit: 240, 360, 500, 1000 Size Chart: S Size: Approx. 30x20mm/1.18x0.79inch L Size: Approx. 70x25mm/2.76x0.98inch Package Includes: 4 Pieces Diamond Sharpening Stones.4 Pieces Diamond Sharpening Stones. 500 Grit(Pink): A must have diamond to maintain a smooth and sharp edge; starts to bring out that high polish shine. Grit: 240, 360, 500, 1000. Color: As Picture shown.