Used set of 1970's 1980's Cadillac hubcap lock anti-theft adaptor.

This adaptor gets tighten with the wheel lug nuts and ables the possibility to lock the hubcap with the little screw. The Cadillac emblem on the hubcaps then covers this screw.

These parts are often lost over the years and might be what your 1970's 1980's Cadillac is missing!