I found a couple of those studs recently too .
I think they must have been for a harness maybe ,as there appeared to be what was probably leather attached
Yes the Ctx is very good.
some bottle caps the older ones get thru as a coin but not many
the cans down deep become a hassle.
The pull rings are ezy, the sounds in cluttered areas
become distinguishable when worked on,
and a great relic detector.
I've had more 1c & 2c coins than any others this year, unfortunately they are a must dig target if looking for pre-decimals. For a minute I thought you found a jar full of silvers.