WSD edge beveller 88 /90 side ski snowboard edge tuner sharpener new new side edger edge tuner, black quickly sharpens side edge of skis and snowboards fits in pocket 88 degree or 90 degree bevel quickly sharpen side edge of skis and snow boards with the ergonomically designed edge tuner. The tool has the ability to apply a responsive 88 degree bevel or a forgiving 90 degree bevel. The edge tuner is lightweight and fits into a pocket for easy transport. File is include rough side for initial edging. Smooth it over with the other side. Easy to use this does a real nice job on your side edges great for the price. Easy to use, small enough to carry with you. Has an arrow on the file showing the direction to sharpen/tune the file can be slid up or down in the plastic holder (if you needed to adjust how far the file sticks out, ) 88 degree angle or 90 degree angle two sided file a rough bumpy side for removing rust or other defects, the smooth side is actually the file that sharpens.