[INCH/MM Conversion]: One button can quickly convert two measuring unit (INCH/MM). Measuring Range:0 - 150mm (6') / Resolution: 0.01mm (0.0005')/Accuracy: ±0.02mm (0.001') [Stainless Steel Material]: The vernier caliper is made of high-strength stainless steel, which is waterproof, stain-proof and oil-proof. The ergonomic design brings you a comfortable feeling. [Large and Clear Display Screen]: Large LCD display gives you a clear reading. The thumb rolling and locking screw provide easy sliding, accurate positioning, and fine adjustment. [Multifunctional Use]: The digital micrometer can easily and accurately measure internal, external, height and depth dimensions. [Automatically shut off]: When you have no action on the dial caliper, it can automatically shut off after 4 minutes.