I've tried the tweezer-like nipple clamps in the past and didn't like them. Yes, they had adjustable tension, but they just didn't seem to stay on. And, being the pain bunny that I am, they just didn't bring me enough sensation to make using them worthwhile.

And then we found these. I say we because my boyfriend is the one who bought them for me and who uses them the most on me. And, oh what a happy woman I am.

These are substantial clamps. They are fully adjustable and should accommodate any nipple size since they adjust from fully shut to 0.75" using a screw and flat bar. In theory they should be able to clamp onto any size nipple, provided they are at least somewhat erect and you pull them out somewhat to ensure you have a goodly bit of nipple/aureola available to clamp. Furthermore the chain is quite heavy. Good for sensation, not so good if you are one of those who can't take a lot of pressure and therefore cannot get a good clamp.

The material is solid. The finish is smooth. I've had these for about a year with fairly consistent use, and there is no change in the finish. The chain is attached with a solid ring to a very solid and weighty chain. On the plus side, I think that once these are on, they stay on well, the downside is that there is no way to incorporate a quick release. Screw the bar down to attach, screw the bar up to detach. If the screws catch at all, a little bit of silicone lube actually works quite well to loosen things up.

Finally there's one last observation about these clamps. They're really not just for nipples. They can clamp onto other body parts and perhaps with somewhat greater success, provided what you're trying to clamp isn't larger than about 0.5" or so. So these will work well for labia clamping as well as other areas (use your imagination).

I am impressed with the construction and quality of these clamps as well as the price. I think that these are some of the best clamps on the market. Please keep in mind I say this because I/we've never really encountered a problem with putting them on, getting them to stay on, or taking them off AND because I have at least average to slightly larger than average nipples.

There are two tricky things to consider: it takes some time to get these screwed down to clamp on. You are probably going to need some patience to get them on and see if they'll stay on. The second tricky aspect is the weight of the clamps from the chain itself. These are not lightweight by any means. In order to get them to stay on, they need to be well tightened and that may mean close to fully shut if you have small nipples because the weight of the chain can pull the clamps off. If you have smaller nipples, you might find the pressure necessary to keep them on too much.

We have used these clamps with the clamps parallel to the floor and also perpendicular. The clamps tend to be a bit more stable and likely to remain in place if you clamp perpendicular to the floor with the chain's loop at the top. However, clamping a bit tighter for a parallel position also holds them well.

I find the chain to be just slightly too short. I'm clamped and there's a bit of give in the chain, but I think it could be just a bit longer. The trade off is that the chain's gauge may need to be a bit lighter given its weight. Pluses and minuses for every change.

Because we like pain play, I can tell you that with sufficient force, these clamps can be pulled off. Yes there is going to be the exquisite spike of pain, but I have yet to have any lasting marks or damage to my nipples. I think that the smoothness of the metal is a key component in that.