Motorcycle Motor Sport Windshield Windscreen Bolt Screw Kit 10PCS Silver Fit For KAWASAKI ZX6R 2007-2012 Bolt color:silver Bolt heads are cold formed and the shanks threads are rolled Tensile strength is 0-560Mpa; which is stronger than mild steel 60% lighter than steel and 40% lighter than Titanium CNC machined from 7075T73 aluminum for smooth finish.