Digital Electronic Waterproof IP65 Z-Axis Setter ~ Easy to set “0” point with LCD screen. ~ Positioning accuracy & repeatability is 0.001″/0.01mm. ~ .0005″/0.01mm resolution. ~ Magnetic base. ~ Height of spring mounted contact face is 52.5mm. ~ Diameter is 55mm. ~ Overall height is 50mm. ~ Supplied in a fitted metal case. ~ Includes SR44 battery.