These aren't your normal nipple clamps! Designed after the classic, painful clover clamps these have an added twist! Not only do they increase in pressure when you pull the long, 12 inch chain⊠They also have spiked rubber tips that dig into the skin and give you an extra bite of pleasure and pain! Made out of nickel-free metal they are perfect for those who like intense nipple stimulation and have sensitive skin. To clean, simply use warm water and mild soap and soak the chain and clamps in them. For more serious cleaning, use a combination of rubbing alcohol and water. Spray with a toy cleaner for good measure after each play session and keep them on hand or slip them into your toy bag to add some spice to any scene! After you've warmed up your submissive partner, you grab the clamps. You rub the nipples to get them to wake up and become perky. Then you pinch the nipple, pulling it away from the chest, and clamp the ends of the clover clamp right behind the nipple, on the areola. You slowly, very slowly release so the pressure builds and doesn't shock them. Then you slowly release the clamp so they can feel the added weight of the metal clamp and feel the spiked tips digging in. You remind them to breathe, let them calm down and center, and then do the same on the other side. You play with them as usual, adding in light slaps and tugging their hair, using a Wartenberg wheel over their flesh and flogging them. Then after about 30 minutes or less, you release the clamps and enjoy the look on their face and their cry of pain as the blood rushes back, awakening the senses in their nipples once more! Measurements: Clamps: 3.5 inches length x 1.5 inches width. Chain: 12 inches length. Clamps open up to 0.5 inches wide. Materials: Metal, rubber Color: Silver Key Features: Intense Pressure: These clover clamps are known to have a firm grip and stay on longer than most! Spiked Rubber Tips: The spiked rubbed tips add more stimulation and sensation! 12 Inch Chain: The chain keeps them together at all times and also adds extra pressure to the clamps when pulled. Nickel-Free Metal: All metal is nickel-free and body-safe for those with sensitive skin.