The Demon Single edge file - for snowboard or ski metal edges.
Sharpening the edges of your snowboard or skis gives you more control by increasing the 'bite' into the snow. This is particularly important when the snow is hard-packed or icy because it enormously assists your ability to stop and turn and to glide nice and smoothly - cutting the ice rather than sliding sideways.
Use long smooth strokes with the Edge File overlapping each section to maintain a uniform edge from tip to tail. If you are unsure as to how much edge to remove, mark the edge with a black magic marker and then file the edge until the marker is gone. Wipe the edge filings off the base, after every two or three strokes, to prevent grinding the edge filings into the base.