This is a low cost solution to the problem of the rubber bumper on the bottom of the spindle on the Polaris RMK ski from breaking down and working into the holes in the ski. When this happens the ski won’t maintain its position when off the ground causing a potential problem. This machined filler pad just drops into the holes in the ski providing a solid flat surface for the rubber spindle bumper. No more problems getting what they call “Polariskied"