Complete Edge Care Kit Base-Side Ski Angle Tool +3 diamonds +Gummi stone Complete Edge Care Kit - Everything you need to professionally sharpen ski and snowboard edges. Side and base edge bevel multi tool (does all angles) and includes a metal file with three DMT diamond stones and a deburring gummi stone. This one tool is all you need to sharpen and bevel your edges for both the base and side edges. Dial a precise angle from 0 degree to 5 degrees in 0.5 degree increments. Does every angle imaginable! One Gumi or Gummi Stone for prepping an edge, deburring as the final step in edge sharpening, or detuning. May be gray or red. Three diamond stones included: Use the black for cutting, the blue to maintain the sharpness and the red to fine sharpen and polish. Don't know your angles? You can use this tool to find them - it's easy!