High precision ±0.03mm Digital calipers Stainless steel refuses to rust Refuse to rust with laser scale and super-hard ruler jaws High precision Accurate measurement ±0.03mm High-precision measurement meets measurement needs Smooth push-pull readings are accurate Freedom of operation/no lagging Durable The notched surface is matte chrome The lines are clear, and the measuring surface is hardened Ulnar claw quenching is more wear-resistant Fine workmanship Stainless steel thickened body Smooth and delicate and comfortable to the touch Four ways to measure One foot is multi-purpose, and can realize outer diameter/inner diameter/step/depth measurement Outer diameter measurement The two outer measuring jaws should be attached to the surface of the measured object Inner diameter measurement The measuring jaw should be measured in the diameter of the hole and should not be skewed Step measurement: The bottom of the step ruler and the bottom of the measured object are close to the top of the object, and the measuring jaw should not be skewed Depth measurement should be so that the depth rod is perpendicular to the bottom surface of the workpiece to be measured Read the scale to the left of the zero line of the secondary ruler on the primary ruler, which is the integer portion of the last reading That is: the main scale is between 32mm-33mm Position of A, main scale = 32mm There is a line on the sub-ruler that is aligned with the main ruler, and the number of grids with the line spacing is read on the sub-ruler. Multiply this by the scale spacing of 0.02mm to get the decimal part of the final reading Position subscale of B = 0.36mm Add the resulting integer and decimal parts to get the total size 32+0.36=32.36mm