Marking gauge, height gauge and depth gauge all in one tool! our digital 3-in-1 marking gauge does everything a traditional marking gauge does and more. As a digital gauge, it does it all with an accuracy of 1/1000th of an inch. Features: measuring range: 0-6"; accuracy: 0.001"; repeatability: 0.0005 inch inch/metric/fractional display and conversion Super high precision hardened alloy marking wheel IP54 humidity & dust resistant Spare battery included.