RPM Dirty Danglers are a cool, funny and unique way to show off your pride in your vehicle. Everyone knows when someone says their vehicle "has balls" they mean power. Well, with a set of RPM Dirty Danglers mounted on your vehicle, when you tell someone your truck has balls, you'll mean it - literally! RPM Dirty Danglers look like a set of real testicles. Are you laughing yet? Yes, they look like mini bull's testicles and are designed to mount to the back of almost any vehicle with a zip tie, screw, wire or chain (mounting hardware not included).