Wheel of pain / Pinwheel with sharp nails A favorite toy for fetish play. For beginners and diehards alike. The medical name for this device is Wartenberg Pinwheel. The sharp, yet teasing points allow you to tickle, tease or, ..... as long as the wheel rolls over your partner's skin. The more spikes, the less the pain. This item is a medical instrument made of stainless steel and can be sterilized in an autoclave. This item is also available in silver (7823). Please note that the rainbow effect on this product is applied by the electrical process called plasma coating. This rainbow look is applied by electric steam rays and cannot come off the pinwheel, unlike material like paint.