Walk the fine line between pain and pleasure more precisely with the Mandible Body Clamp set.Based on vintage surgical clamps from 1909, these unique clamps adjust with screws- making them more adjustable from light to tight than the traditional Japanese Clover clamps they resemble, as well as tweezer and other spring-style clamps.Use them on nipples; tongues; or other sensitive body parts. Always start gently and increase pressure gradually when playing with body clamps. Stop when clamps stay on by themselves; move or shift clamps to a new location after a few minutes.Gap between tips adjusts from 1/16'' to '' (0.16cm - 1.27cm) wide - turn the knobs closest to the clamps anticlockwise to tighten them.Rubbery PVC prong tips are safe for latex allergies and may be removed for extra-intense sensations. Clamps and chain are of chrome-plated brass; clamps measure 2'' (5cm) long by 1'' (2.5cm) wide when fully closed; chain 18'' (45.7cm) long.