Wartenberg Neuro Pinwheel Stainless Steel 3 Head Diagnostic Instrument Pin Wheel - Multi Color Rainbow. 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.? Triple head pinwheel.? Non-slip handle. ? Easy to use.? Multi Titanium Color Rainbow. Specification: :? Material: Stainless Steel. ? Weight: 2.75 Ounces. ? Size: 6.6 inches.