I used this clasp for a Celtic Peyote Bracelet project. I made the bracelet quit snug on my wrist (I used all the beads) and I had it on for a couple of hours. I live in tropical Australia and it's very hot here atm. My wrist was sweating under the bracelet, and when I took it off I've noticed that the gold came off on a small portion of the clasp. So if you buy this and use it in projects that you sell, you should let the clients know and instruct them to wear the jewellery with care. Otherwise, very nice clasp, adds class to the project!