• Range: 4" to 20"/100 to 500mm • Reads in Inch/Metric/Fraction • Resolution 0.0005"/0.01mm (fractions in 1/64" increments) • Dust water and oil resistant to IP54 standards • Extra-long jaws which allow for increased measurement capability are etched with depth markings and have threaded holes for depth stop locations (1" and 1.5") to ensure proper measuring alignment • 4" preset without the need for a master for internal measurements. • Zero setting and reversible contact points for external measurements (can be used for some rotor and disc measurements) • Hold function