WARTENBERG Stainless Steel PIN Wheel 2 Head. Wartenberg Neuro Pinwheel Stainless Steel 2 Head Diagnostic Instrument Pin Wheel - Strong Pinwheel Description: The operation method is very simple and easy to use. Roll the tip back and forth on the skin to know the sensitivity level by the degree of reaction. Strong Point: ♥High quality stainless steel ♥2 Head pinwheel ♥Non-slip handle ♥Easy to use and storage ♥Fadeless and comfortable to grip Specification: Material: Stainless Steel Weight: 2.47 Ounces Size: 6.6in Easy to operate: It has 3 head and create strong sensation, and rolling fan design, adaptable for testing nerve sensitivity by rolling the pointed tip back and forth on the skin.