H2H (Heart 2 Heart) is an extensive line of adult pleasure toys designed for the fastest growing segment of adult product buyers in the world today, everyday women and the men who love them! Two very important components make up the brand that is H2H. The finest quality, skin safe products on the market today and beautiful packaging that is playful and suggestive but not objectionable in any way. The first goal of the H2H brand is product quality and safety. Take a close look and you are sure to see the difference. Heart-2-Heart Nipple Clamps Alligator Ends with Chain Black. Titillation with a touch of glamor! 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. PHS International makes and sells a variety of different types of nipple clamps these include; jaws clamps, alligator clamps, barrel clamps, tweezer clamps, press clamps; plier clamps, wide tip tweezer clamps, weighted clamps, and criss cross clamps.