Three-wire Gauge

Eisen Pin Gauge Three-wire gauges TW series – for measuring screws and are detachable from the chains by MSP Metrology (M) Sdn Bhd from Eisen Japan.
Spectification Series Tolerance Roundness/Cylindricity Size Variation HRC Hardness TW ±2.0μm 0.5μm 0.5μm 58 HRC or greater TWW 90.