All models were at least 18 years old at the time of their performance. 18 U.S.C. 2257 Record-Keeping Requirements Compliance Statement.
Two different styles - one pair connected by a purple chain, the other by a silver-painted bead chain. The clamps' intensity level is adjusted by a screw: clockwise and the pressure increases, counter-clockwise and it decreases. These are probably best suited for stocking by adult retailers as opposed to fetish/leather boutiques.
