The Faithfull Vernier Calipers are manufactured from hardened stainless steel with dual reading in Imperial to 0.001in and in Metric to 0.02mm. The universal four-way measurement facility enables reading in External, Internal, Depth and Step modes. The sliding thumblock feature easily allows quick and precise measurements to be taken. The satin finished scales and beam ensure fast, easy and accurate readings. Range: 150mm (6in).Graduations: 0.02mm and 0.001in increments.