Accurate and precise: measuring range: 0 - 150 mm (6 inches); Resolution: 0.02 mm (0.001 inch); Accuracy: 0.03 mm (0.001 in). Convenient to use: A digital caliper can often cause problems with dead batteries and faulty displays. You get a brake caliper that makes all electronic frills superfluous and works without any problems. Stainless steel material and no battery required. An ideal tool for lifelong use. Wide range of applications: our stainless steel caliper can measure not only the length, but also the width, height, depth, inner and outer diameter of goods . Brake calipers are very popular in industrial and automobile, professional, household measurement and office work. High quality material: The brake caliper with finely polished stainless steel frame and knurled thumb roller guarantee smooth sliding, robustness, durability and long life of life. Not easily deformed, ensures precision. It is easy to store and transport and. Features Precise measuring tools Each basic unit is divided into 10 parts. Vernier caliper with storage case and instructions More Precise Measuring Tools The caliper measures in tenths of an inch and tenths of a cm for greater precision. Standard Thread (Inch and Metric) A sticker on the back indicates the Whitworth and metric thread standard. Fixed thumb rest The thumb rest of the caliper cannot slide like the wheel of the digital caliper. It is designed to facilitate one-handed use for people to hold the caliper and adjust the position when measuring objects. Measurement Methods External Diameter Measure the outer diameter or length of objects with the jaw. Inner diameter Measure the inside diameter of objects with the upper jaws. Depth Measurement Measure the depth of objects with the depth gauge blade.