LCD Display Vernier Caliper Stainless Steel Electronic Digital Ruler 150mm/6in

How to Use: Measuring outer diameter: the two outer measuring jaws should be attached to the surface of the object to be measured. Measure the inner diameter: the measuring jaw should be measured upwards from the diameter of the hole, and cannot be skewed. Measuring step: keep the measuring jaw at the bottom of the step ruler and the flat top measuring jaw at the bottom of the measured object close to the top of the object and keep it flat without being skewed. Measuring depth: the depth rod should be perpendicular to the bottom surface of the measured workpiece. Specification: Item Type: Vernier Caliper Body Material: Stainless Steel Error Value: ±0.02mm Resolution: 0.01mm Maximum Measuring Range:150mm (6in) Battery: 1 x LR44 button battery (battery not included) Package List: 1 x Vernier Caliper (Battery Not Included) 1 x Screwdriver  1 x Manual