Fowler High Precision Features: Direct Inch/Metric Conversion IP54 Coolant & fluid resistant Auto Off feature 2-1/4" dial face 3/8" stem - 4-48 thread Resolution .00005"/.001mm Accuracy: .00016"/.004mm (to 1") Tolerance indicators Absolute/incremental reading Lugback on 1/2" model. Floating zero Carbide tipped point