Abstract: The present invention relates to a system for measuring a part, and an apparatus for measuring which is a dimensional gage for measuring inside and outside surfaces of an object, that comprises (1) a gage base; (2) at least three removable spindles attached to the gage base; (3) a moveable roll assembly attached to the gage base further comprising at least one guide rod, at least one spindle guide block, at least one linear bearing, at last one spring, and at least one guide rail block; (4) a plurality of measuring means attached to each of said removable spindles and spaced equidistantly around a central axis with each of the measuring means being spaced equidistantly from the other measuring means around the central axis, and wherein at least one of the measuring means is removable attached to the moveable roll assembly; (5) a lever for adjusting the movable roll assembly to engage the measuring means removably attached to the moveable roll assembly with a test part; (6) a housing attached to the gage base;