Highest quality standard Finely polished stainless steel frame caliper with knurled roller and locking screw to ensure smoothness and precise position during use. Using a hardened process, no rust, more durable, longer life Precise measurement Digital caliper measures up to 6" / 150mm with an accuracy of 0.01mm. This allows you to zero and start a new measurement at any point on the scale and instantly convert between inches/millimeters at the touch of a button king size With 4 measurement functions, inside diameter, outside diameter, Depth and Scale Extra Large LCD Display Digital caliper with a large, easy to read LCD display that makes reading results clearer. Readings can be displayed in inch or millimeter format. Dust and oil proof Versatility This professional digital caliper measures inside, outside, depth and pitch with two sets of jaws and probe; With the zero button, we can reset the value during the measurement to have more flexibility of use Bonus Digital caliper is equipped with an LR44, 1.5V button battery and comes with a extra button battery. This caliper is CE certified. Digital gauges equipped with an automatic on/off function, so your battery won't run out on arrival. Home and professional use is highly recommended