
Over many years I have found that metal tags with metal rings do not last very long whatever the make. Metal on metal always wears thin whether it is the disc itself or the split circular ring that attaches to the collar.
I have been using for quiet a few years "
Identitag" discs. They are a vinyl type plastic, very hard wearing, the information on each tag is very clear and does not rub away.
My first tag to wear thin around the hole was easily 4 years old.
Purchased online and a large choice of colours, you can put a lot og information on both sides. Thoroughly recommended.
I would never buy a metal disk of any make again