Black Metal Beaded Alligator Nipple Clamps. These adjustable deluxe wide alligator nipple clamps feature wide, rubber-tipped ends that distribute the pressure evenly along the clamp. The adjustable thumbscrews allow you to choose how strong you would like the pressure, from a light pleasurable sensation to stingingly painful. Featuring petite black beaded glass drop adornments, these high quality nipple clamps are attractive, easy to use, and great for beginners and more advanced users alike.