Left hand studs
Well the rest of my collection varies. Obviously the prior Kelsey Hayes were 7/16”. The rest are as follows. Apparently they were totally random and perhaps as mentioned, aftermarket. Now I might have thought it was a Canadian thing, but the first ones I discovered I think are from a set I bought from badlilred. So those came from the U.S. Also the L E F T is different on both sets. The latter are actually together like a word vs separated. Hmmmmm, useless tidbits! :)
My L E F T are 1/2”.
The ring is both 1/2” & 7/16”.
The plain are 1/2”.