2 measuring tools in 1. This tool functions as an indicator or as depth gage. The 5 included extension rods extend the measurement anywhere between 0 and 16″ in 1″ intervals to measure deeper. Includes 5 interchangeable depth rods (1″, 2″, 3″, 4″ and 5″) to extend the measuring depth to 16″. 3-Reading functions: inch, metric, & fractional. Spring loaded movement for easy use. Use as an indicator or depth gage. Large LCD display. 4-48 Thread interchangeable carbide tipped point. Resolution: 0.0005″ / .01mm / 1/64″. Indicator travel: 1″. Measure range: 0 – 16″ / 400mm. Accuracy: 0.001″. IP54 Protection from fluids and dust.