Key fob to keep keys from getting tangled together and banging together when in the ignition.

Print 2 of these, bolt together with a 6-32 screw and Nylock nuts with washers to space keys apart. a spring washer helps to keep tension on keys so they stay in place. Use as long of screws as needed. snug lock nuts so the keys still turn with resistance, and grind the excess sticking out of nut off.

Attribution - Creative Commons

key, keychain, fob