Over time, I've bought ~ 200 of these clasps. The are not my favorite, but the price is good compared to other places. There are two problems with these clasps. 1) the opening it too small. It's so tiny it makes it difficult to get the chain in the opening. (2) A number of the clasps are too stuck to use. Every so often, I use one that I need to unstick with pliers(!), and then it may or may not work ok after that. So, if you need less expensive sterling clasps, these will do. But they are not top quality compared to others I've had.