These nipple clamps came with our recent lingerie purchase. The wife had a problem with her old clamps where you adjusted the pinch with a little bolt. So we thought we would try the tweezer style with the slide adjustment.
We ordered the Fresh tweezer nipple clamps by PHS International. The chain is a light blue painted metal. In between the tweezers is a foot long chain. Perfect for getting ahold of while your going to town. Don't worry about them coming off with a little tug either. The rubber tips are REALLY on there. And the pinch is pretty much one setting. REALLY TIGHT. All the slider adjustment does is lock them down. They are pretty thin, so there is some pressure marks left on the nipple. Since we have had previous experience with nipple clamps, this was not really a problem. These would be a spot on purchase for anyone with nipple piercings. Due to the tweezer being so thin, you can fit it behind a piercing. If these are going to be your first pair, BE WARNED. They hurt a bit. Both tweezer clamps had the same amount of squeeze to them.

The packaging was a hinged plactic, where you pull the back out of the front, then another piece of platic holding them into a display style for the front. Then of course, the piece of cardboard with the picture of a happy model on it.

As far as cleaning goes, I would just worry about cleaning the tips. Use a body wipe or some tissues and sanitizer. If you get the metal wet there is a chance it could rust.

Eden Fantasys would be your best bet on these clamps due to price and availability. I've never seen them before, not even at our local adult store. These clamps are for experienced users. Please use carefully.

These STILL aren't for beginners. In order for them to stay on the nipple while some tugging is going on, I just turned them a little. I'm starting to like them a little more, but not enough to use them as much as I would like to.