These are fantastic as a biginner set of clamps. They've got just the right amount of bite and don't slip off, not to mention they're cute. They're adjustable as well so you can work your way up to a tighter pinch. I highly recommend these!
I bought these because of the price and I didn't know how far she would let me go. She agreed to put them on and it took a little coaxing to get them to stay on her nipples but once the were on she was on fire. The only down side is the way they taste when they are licked.