Every gauge carries a calibration certificate giving actual values Bore gauge covering a range of 50-150 mm, is widely used by Automobile, Aircraft, Engine and Pump manufacturers, High wear resistance due to carbide-tipped fixed and moving anvils, Extra wide bridge ensures automatic centering in the bore,Self-centralizing feature of this bore gauge ensures that measurement can be done with minimum skill, Furnished in a sleek wooden case containing measurement anvils and extension rods with necessary tools