The Wartenberg wheel is a rotating wheel studded with sharp pins attached to a handle. It was originally invented by Dr. Robert Wartenberg and was used to test nerves and skin sensitivity. Today, however, it is very rarely used in medical settings, and has become more of a sex toy. The prickly wheel on this device can be rolled or dragged across the skin to create a number of different sensations, from tickling to prickly. It is most often used during sensation play.
More About Wartenberg Wheel
A Wartenberg wheel can be used to create a number of different sensations depending on how its used. Lightly rolling or dragging the device across a sensitive erogenous zone can create a very light, tickling sensation. More pressure can create a slightly more painful, yet erotic, sensation. Be careful not to push too hard, as this can cause cuts, abrasions, punctures, or bruising.