The GiroDisc 2-Piece Slotted Performance Brake Rotors use 8 or 10 high-strength steel-driving pins manufactured by Girodisc in the USA to strict standards and cadmium coated for corrosion protection. GiroDisc Rotors are lighter and respond faster than original heavy rotors. GiroRotors are compatible with OE calipers and maintain OEM brake bias and ABS. These pins handle braking loads while preserving axial and radial float between hat and disc. Cap screws with reinforced washers safeguard the pins. The pins are fitted with anti-noise spring washers on the rotor side to protect the rotors from generating noise while cold. This allows the rotor to expand with heat but eliminates the rattling and noise typical with floating rotors. The rotor can self-center with this float. After installing Girodisc, just replace the cast iron rotor.