From Sportsheets Sexperiments line Tug On My Heart Nipple Clamps are great for hands free erotic stimulation. Perfect for the beginner.. Rings slide down the shaft of the tweezer like clip for as snug as you like sensations, while the chain drapes across your abdomen.Soft pads at end for added comfort. Includes: 1 pair of Tug On My Heart Nipple Clips with 13 inches connecting metal chain. Materials: 90% Nickel free metal, 10% PVC.