150mm LCD Digital Steel Caliper Measures Inner Diameter, Outer Diameter, Depth 0-15mmProfessional measurement1. Metal material, high quality, durable2. Support 0-150mm Length, Depth, Inner Diameter and Outer Diameter; RollsThe thrust adjusts the measurement accuracy more precisely3. Millimeter to Inches Conversion Key, Zero Key4. Large LCD display with backlight function for easy reading5. Comes with 2 button batteries and a battery removal tool+ productMetric/Inch two systemsOne-touch switch metric and inch measurement mode automatic conversionClosed pulley, higher measuring accuracy Closed metal auxiliary wheel design for smooth measurement and improved measuring accuracy Measurement of the outer diameter Measurement of the inner diameter Step test Depth testSupport 0-150mm Length, Depth, Inner Diameter and Outer Diameter; Push roller adjusts the measuring accuracy more preciselyFeatures1 x Vernier Caliper;2 x Button Batteries1 x Battery Removal Tool