I have black eyebolts on my M2 and they broke my normal wrench during the winter/summer wheel swap. I was hoping this product wouldn't ruin them. However, it seems more about not damaging the wheel and to hell with the nuts/bolts. It has a plastic grommet that sits between the bushing and the lug nut/bolt hole so it protects the cavity but doesn't really do anything to protect the painted nuts/bolts themselves.