Coupling multipurpose caliper

The utility model provides a coupling multi-functional caliper rule, which comprises a caliper rule body and a vernier; wherein, a measure claw is arranged respectively on the caliper rule body and the vernier, a locating piece fixed by screws are disposed in front of the caliper rule body and on the vernier, inverse claws are positioned on a lower part of the measure claws of the caliper rule body and the caliper rule body, initial scales for measuring are marked on the caliper rule body and the values of the scales are twice as long as the inverse claws on the lower part of the measure claw. The utility model has the advantages that the caliper rule can be used instead of an internal micrometer and a bore dial indicator for measuring the height of a concave convex table in coupling the internal diameter to find out the optimal reading point, the measuring is simple, the verifying time is shortened and the measuring speed is quickened. The inverse claws are arranged on the lower part of the caliper rule body