Krator SPL-002 Black Swingram Spool Slider (Low Profile 6mm (Fits Bikes) Yamaha YZFR1 R1 R6S 600 1000 FZ6 YZF) Specifications: Low Profile Mini 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