Don Jr, I know all about them because it was one of the most stupid, aggravating setups I’ve ever had to change a tire on at night.

The drums also had a small alignment stud that stuck out and fit into small hole in the rim to help align/hold the wheel while the first couple of lug bolts were installed…..of course many of them had been cut off when the wheels without the alignment holes/custom wheels were installed. YUP a real joy.