Mister B carries its most popular nipple clamp (the Mawa Nipple Clamp) are also in a hefty extra large version. The Mawa Clamps XL, because of its larger size, is very easy to put on and off, even with greasy slippery fingers or with thick gloves on. The spring that provides pressure is stronger too, so these nipple clamps really do their job well and are not intended for the faint hearted. The extra thick chain between the clamps matches the butch look of these clamps. Non adjustable.