The Pipedream Fetish Fantasy Nipple Barrel Clamps. Get just the right amount of pinch on your breast's most sensitive areas with these incredible Nipple Barrel Clamps. These comfortable nipple clamps feature precision twist-shafts that gently adjust the amount of squeeze applied to your perky nipples. With each turn of the decorative barrel cylinder, the rubber-lined clamps gently apply pressure to your pert nipples, increasing sensations and forcing your nipples to perk with pleasure. The attached O-rings let you add your favorite weights or chains to each clamp, making these clamps the ultimate fetish must-have for nipple teasing and pleasing. Chain & clamps: metal. Barrels: plastic. Liners: Rubber.