These are the classic clover nipple clamps but with a 13 inch long chain connecting the two clamps together. So what makes clover nipple clamps so special? The answer is simple: when these clamps are attached to a nipple they tighten the more pressure you put on them thanks to their unique design. So just imagine how much pressure you could put on them, via the chain. These clover nipple clamps work their magic best when attached to both nipples and slight pressure is applied to the chain. Go on try them, we dare you.