Southpaw, they are hand stamped.. So the info can't rub of as it's indented. I really like them. I took people's ideas from tag threads. I have my dog's name and my number on the front of the washer, and 'if i am alone i am lost' on the back.
I've never had unique tags before.. I actually have my dogs wearing them for once.. I often have left them tag free in past.