Master Series Adjustable Black Nipple Tweezer Clamps. Look stylish while using these Black Nipple Tweezer Clamps. Made for nipple play, also works great on other parts of the body, these clamps go around each nipple and squeeze. You can control the amount of pressure you want by simply sliding either up or down on the ring. Tease and play with them as they try and anticipate just how much pressure you will give them.