Description: Made of aluminum, durable and pratical . This indicator mainly measure surface variations in narrow or recessed areas 0-0.8mm measuring range. Using a special measuring device to achieve automatic steering direction Measuring lever connecting end embedded in precision ball bearings Dovetail mounts for mounting indicator from the top,back,or front in a range of mounting options. Specification: Material: aluminum Size: Approx. 80x38mm/3.15x1.5inch Measuring Range: 0-0.8mm Accuracy: 0.01mm Package Includes: 1 piece Lever Dial Indicator Note: Pls allow an error of 1-3mm due to the difference of manual measurement