High quality "RR" Logo Engraved Billet Aluminum Swingarm Spools/Sliders(Left & Right Sides). Easy installation! bolt straight into your swingarm (mounting bolts are included).. These swingarm spools are designed to protect your swingarm & axle nut in the event of a crash.. They can also be used with a race stand to lift the rear wheel off of the ground for changing your tire or oiling your chain.. PROTECT YOUR BIKE ! LASER ETCHED LOGO.