10 x CNC Street Fighter Aluminum Motorcycle Windshield Windscreen Bolt Screw Kit Gold Fit For Honda CBR 600 F2 F3 F4 F4i 1991-2007 Bolt color:gold 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. Bolt heads are cold formed and the shanks threads are rolled