Krator SA009-B Black Swingram Spool Slider (Yamaha Spiked-R1 R6 VMAX FZ1 FZ6 YZF600 and More (1998-2015) Attributes: High Quality Billet Aluminum Spiked 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