HK GROUP Swingarm Spools Slider for Yamaha YZF R1 R6 R6S YZFR1 YZFR6 YZFR6S YZF-R6S Carbon Fitment:Yamaha YZF R1 1998-2012;Yamaha YZF R6 1999-2012;Yamaha YZF R6S 2006-2009 They can also be used with a lift stand to lift the rear wheel off of the ground for changing your tire or oiling your chain. These swingarm spools are designed to protect your swingarm & axle nut in the event of a crash. Thread: 6mm Instructions: no instruction,Material: High Quality Billet Aluminum