Powell Peralta has been out here keeping the dream alive for the better part of 40 years. If it ain’t broke, don’t fix it… this isn’t Bonite! These are the same classic rails and skid plates that skaters have been riding for years. Both the Rib Bones and Tail Bones feature their original shape. Rib Bones are 14.5” pre-drilled rails (5 holes) constructed with UHMW polyethylene which come with mounting screws. These rails are great for sliding and protecting graphics. Tail Bones are 8.0” wide with 3 drilled pilot holes. It is very important that users follow the instructions included within the packaging! This listing includes your choice of colors and includes 1 set of Rib Bones rails and 1 Tail Bone, Brand New In Packaging.