I really liked having these clamps used on me. I havent been playing very long and my master tried several kinds of clamps on me but these id have to say were the best. I cant take really heavy pain on my breasts yet but these were just enough to make me extra sensitive without over sensitisingme. They really go from a firm grip to a very intense pinch. These are perfect to use for a gradual build-up of pain and pleasure. Thanx so much!