8-piece portable sharpening stone set, ideal for removing excess burr from the base of the ski, use for daily sharpening of your ski or snowboard. 240 Grit (Black): Used to remove case hardening damage caused by . 360 Grit (Blue): Used to deburr the steel sides of skis and snowboards or to treat minor damage caused by stones. 500 Grit (Pink): A diamond essential for maintaining a smooth, sharp edge; begins to bring out a brilliant shine. 1000 Grit (Green): Final diamond polishing when seeking that mirror-like finish; extremely precise edge accuracy; Used on alpine and snowboard skis to achieve that super smooth finish. Type: Sharpening Stone Set Color: As shown Material: Diamond Package Contents: 2 Set x Sharpening Stone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.