So the difference between the upper and lower scales will be 0.1mm (1mm-0.9mm = 0.1mm).

Therefore, such a measuring tool can be accurate to 0. 1 mm, and vernier caliper is a measuring tool for measuring length, inside and outside diameter and depth. The vernier caliper consists of a main ruler and a sliding vernier attached to the main ruler. The main ruler is usually in millimeters, and there are 10, 20 or 50 scales on the cursor. According to different divisions, vernier calipers can be divided into ten-degree vernier calipers, twenty-degree vernier calipers and fifty-degree vernier calipers. The cursor is 65438.

There are two pairs of movable measuring claws on the main ruler and vernier of vernier caliper, namely, the inner measuring claw and the outer measuring claw. The inner measuring claw is usually used to measure the inner diameter, and the outer measuring claw is usually used to measure the length and outer diameter.