These hefty barrel clamps can be considered as the Rolls Royce among any nipple clamps collection. They’re quite heavy and feature a good sized mouth that really holds well onto the nipple once applied. The barrel of these clamps end in a cone. When the cone is screwed inwards into the clamp by turning the barrel, the clamp will gradually but surely close, increasing the pressure until the wearer hits the roof. So these clamps give you the opportunity to ever increasing or renewing sensation when the wearer gets used to them, which is a feature lovers of tit torture will appreciate. These clamps are easy to operate, even with greasy or gloved fingers.