I use the caliper to measure diameters in cables, wires, and conductors. So far, I have nothing negative to say, it seems stable and reliable. If you want to measure up to the tenth of a millimeter, then you will have a reliable measurement. In the hundredth of a millimeter, small errors occur in materials with elasticity, for example, due to compression of the material if you apply force to the sliding measuring head of the caliper.