Vibrating Nipple Clamps for her, him or both of them. Alligator ends are dual rubber dipped for comfort. Non-tarnishing vibrating nipple clamps can easily adjusted with tension enhancer screws. Very powerful multiple speed vibrations. Safe and pure for body and pleasure. Made using phthalate free, non-toxic materials steel with latex tips, ABS plastic stimulators. Vibrating nipple clamps require 3 AA batteries, not included. Do not leave batteries in the vibrator between uses. Bullet with clamp measures 4.5 inches long. Clamp measures 1.75 inches long. Nipple clamps can be applied to the nipples of either men or women. They create pain/pleasure by restricting blood flow from erect nipples by applying pressure to them. Most nipple clamps are adjustable allowing the user to determine the amount of pressure.