Fowler EZ-Drum REACH Electronic Brake Drum Gage

4"-18.7"/100-475mm capacity (internal measurements)Inch/metric/fraction conversion The included 4" setting master and 4" drum preset (101.60mm) ensure accurate internal measurements. Floating zero sets zero anywhere Hold function Resolution: 0.0005"/0.01mm/fractions in 1/64th" incrementsAccuracy: 0.005"/0.13mmDust, water and oil resistant to IP54 standards RS232 output for direct computer connection Beam has vernier scale to double check readingConversion chart on back of main carriage Steel conical contact points Carriage lock screw Includes fitted case