This is toy is a Wartenberg Wheel designed to provide sensation to sensitive areas such as the nipples, genitals, thighs, back of the neck, feet, etc as you run it along these areas. Unlike most wheels, this Wartenberg instead of “pins” has tiny teeth that are too small to pierce skin and provide mild sensation when dragged along the skin. This makes it good for light, teasing, or sensual play however it makes it very poor if you’re looking for intense, painful or heavy BDSM play.