If you're someone who likes to have total control over the pinch factor of your nipple clamps...back away slowly; these aren't for you! From the Master Series, the Tyrant Clamps are spikey, non-adjustable, and over-the-top intense. Aside from their (tight!) automatic pressure - they latch on as soon as you or someone else has let them close - the Tyrant's feature spikey metal tips that add (tons of) extra sensation to the classic pinch. Pull the 14.75"/37.5cm chain to increase the bite. In nickel-free metal, the Clamps can be spot-cleaned as needed. *Each clamp is about 3.5"/9cm long, 1.5"/3.8 wide, and opens to .24"/.6cm max.