Diamond Stones for Sharpening Ski Edges on Snowboard and Ski Sharpeners L Portable 4-piece sharpening set, ideal for removing excess burrs, used for daily sharpening of skis or snowboards. 240 Grit (black): used to remove surface hardening from damage caused by rocks. 360 Grit (blue): used for deburring the steel edges of skis and snowboards or for removing minor damage caused by rocks. 500 Grit (pink): helps achieve a smooth and sharp edge; begins to produce a high-gloss finish. 1000 Grit (green): provides final diamond polishing for a mirror-like finish; ensures precise edge accuracy; used on skis and snowboards for a super smooth result. Specifications: Material: Diamond Color: as shown in picture Grit: 240, 360, 500, 1000 Size: Size S: approx. 30x20mm / 1.18x0.79 inch Size L: approx. 70x25mm / 2.76x0.98 inch Package Includes: 4 Pieces Diamond Sharpening Stones