【Highest quality standard】Vernier caliper, finely polished stainless steel frame with knurled roller and locking screw to ensure smooth running and precise position during use. With hardened process, no rust, more durable, longer service life. 【Precise measurement】Digital caliper measures up to 6 inches/150 mm with an accuracy of 0.01 mm. This allows you to zero and start a new measurement Any point on the scale and instant conversion between inches/millimeters with 4 measurement functions, inner diameter, outer diameter, depth and scale A large, easy-to-read LCD display that shows the readings in inch or millimeter format. 【Versatility】This professional digital caliper measures inside, outside and depth measurements Pitch with two sets of jaws and the "zero" button, we can reset the value during the measurement to have more flexibility in use [Bonus] The digital caliper is equipped with a 1.5V LR44 button cell battery.