Krator Black Swingarm Spools Sliders Motorcycle Bobbins For Yamaha YZF600 (YZF600RSC) 2004-2007 These 6mm thread swingarm spools are designed to protectyour swingarm & axle nut in the event of a crash. Used with Lift Stands to lift rear wheel. High quality Delrin Swingarm Spools/Sliders(Left & Right Sides) Brand: Krator | Easy installation! Bolt straight into your swingarm Fitment: Yamaha YZF600 (YZF600RSC) 2004-2007