Yellow Caliper Racing Brake Disc Omega Shape Ring Key Chain Designed after a performance oriented brake disc found on higher end sport cars. This die-cast metal 1-1/4 inches miniature brake disc keychain features a rotor that actually rotates within the brake caliper. The rotor surfaces are fitted with photo-etched stainless steel plates that have been manually brushed to simulate hairline braking marks. Brand new high-quality product.