Sensation play at the tip of your finger. This unique take on a Wartenberg wheel allows you to wear two pinwheels on a ring-like device. The smooth rolling motion on your loverft.s skin will produce a prickly, painful pleasure. Blindfold them to heighten the stimulation. This durable instrument is secure on most fingers due to its three-ring design. Measures 3.75 in. long. Inner ring diameter is 0.8 in.