i recently had a bondage adventure with my long time girlfriend/mistress and she used these in her game, it was to stand on a cinder block wearing high heels and these clamps but what i dint know was that the clamps were attached to the celing so when she said step down if you need to i was like OMG this hurts not to mention my hands were tied to a length of chain behind me so my body was thrust forward even more making it hurt alot great product x