Professional tool for commercial or occasional use Precision made Vernier Caliper -Features a large LCD Screen for easy use. -Carbon fibre construction so lightweight to use but till strong enough to last -Suitable for both internal and external sizes. -Also can measure hole / thread depth with the built in depth stop. -Simple way to make accurate measurements of internal and external distances up to 150mm -Includes depth measuring tool -Can display in metric or SAE (imperial sizes) -Measuring range 0 - 150mm / 0 - 6" -Accuracy plus or minus 0.02mm (0 - 100mm) range and plus or minus 0.03mm (100mm plus range) -Accuracy is also effected in areas of very high humidity (over 80%)