It is a dedicated measuring device for measuring the deflection of the engine crank such as automobiles and ships.

Suitable for measuring various precision axis of a round material workpiece, and precision gears and the eccentricity of such pinion (shake).
Depending on the shape of the work, the unevenness of the center will be easily switched. Movement of the center is also possible.
There are two types, standard type (interval amount 0.01mm) and the precise type (interval amount 0.001mm).”