Double rotating wheel neurological plastic cement Wartenburg pinwheels nerve tester rotating wheel. Made of plastic cement. Classic nerve stimulator points are not sharp enough to puncture the skin unless excessive pressure is applied. This item is a distinctive addition to a violet wand, it can create a very intense stimulus when used with the wand. For those times when more is more, this pinwheel boasts a full five independently rotating spiked wheels to help you take your sensation play to the next level.