Krator HBD030-6B Swingram Spool Slider (YAMAHA YZF R1 R6 R6S SPIKE FRAME) Features: High Quality Billet Aluminum Swing arm Spools/Sliders(Left & Right Sides)These swing arm spools are designed to protect your swing arm & axle nut in the event of a crash Easy installation! No additional hardware required Manufactured in China