6mm Swingarm Spools Slider For Yamaha Yzf R1 R6 R6S Yzfr1 Yzfr6 Yzfr6S Black These swingarm spools are designed to protect your swingarm & axle nut in the event of a crash. 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. Thread: 6mm Color: the same with pictures show Instructions: no instruction,Material: High Quality Billet Aluminum,,,,,