I ordered these since I am new to nipple play and liked the idea of adjust ability. The problem is that the rubber tips come off way too easily. I guess that's good if you want the sharp metal on your skin, but I don't. I really can't say how they work since they wouldn't stay on long enough to try. I tried the clit clamp too, and it did the same thing. I didn't want to cut myself on the metal with out the tips, so I took them off. Maybe I should try to glue them on, but I don't think I should have to do that for a product that I paid more than $20 for.