Caliper bolt anti-rattle clip

They are actually not anti rattle clips. They are really a guide pin bushing retainer. Their job is to hold the rubber bushing in the caliper housing from backing out. They became unnecessary when Mopar went to the slider type caliper instead of the pin/rubber bushing style. The parts sellers get a ridiculous price because they can.
71-72 Mopar B C E Body Cuda GTX Chrysler Disc Brake Caliper Pin Positioner Set | eBay