This Highly Visible Gauge Gives You The Ability To Measure With Great Accuracy In 0.001" Increment. Measures 0 - 0.03" . Mini Dial Shows Additional Details. 2" Dial Diameter, And Overall 5" Long.* Carbide Contact .080" Ball Diameter * 2 Dovetail Clamps 3/8 & 5/32" * 180 Degree Swivel, 0-.03" Range * 2 Directional Function * Contact Point With Auto Reverse