Special design for both the NEW Ski-Doo Rev XP and Camoplast single ply tracks, Lower shoulder and tapered head to mount flush in track and eliminate idler wheel damage and vibration. Longer taper and 60 degree carbide tip for unbeatable penetration. Exclusive track gripping rings to prevent tear out. Double Bull Kits sold with huge 2-hole "Double Bull" backers and lightweight aluminum support nut - Unmatched durability and performance