Made right here in the USA just for KittyCatParts.com, these ski skins are specifically molded for all stock Kitty Cat skis. These skins are made out of super durable and slippery 1/8" HDPE plastic and they fit just right! To keep the price down, you do have to drill the holes to mount them, which requires a 3/8" and 3/16" diameter drill bit. When mounting these skins, the rivet holes for the rubber tip bumpers are drilled out with the 3/16" drill bit to allow use of included stainless steel mounting hardware (not shown). The 3/8" drill bit is used to drill the holes for mounting the ski wear bars.