These Pipedream Extreme Nipple Weights will stimulate your nipples! Each nipple clamp is attached to a round metal weight with grooves at the bottom. Simply attach more weight by screwing on one of the four additional weights. The more often you play the more weight you'll be able to handle. The adjustable screws allow you to modify the amount of pressure on the nipple, while the soft rubber lining helps to ease the pinch.