This product is also referred to as the Wartenberg wheel, Wartenberg pinwheel or the Wartenberg neurowheel.The Wartenberg wheel is 23cm – 9 inches in length, is made of stainless steel, and has an ergonomic design that facilitates grip.The Wartenberg Sensibility Instrument is a diagnostic instrument systematically rolled across the skin to check nerve reactions. Author NameWartenbergSpecialtyDiagnostic, Neurosurgery / SpineCategoryImpactorsHandle TypeHollow HandleOverall Length19 cm – 7 1/2"FinishSatinMaterialStainless SteelCE MarkingYesReusableYes..