Made of high-quality materials for durability, Measure 0 to 6 inches (0 to 150 mm) in 0.0005 inch (0.01 mm) increments for precise use. Digital readout LCD displays inch or metric units for versatility when measuring, Advanced Field Sensor (AOS) electromagnetic induction sensor resistant to dirt, oil and water. Measures interior, exterior, depth and step values for versatility. With thumb wheel. (0.01 mm) increments for accuracy and an advanced field sensor (AOS) electromagnetic induction sensor that resists Dirt, oil, and water. Its digital readout LCD displays inch or metric units for versatility and allows absolute or incremental measurement readouts. Electronic calipers measure interior, exterior, depth and step values for versatility and include a protective case.