They are several gages elements to be checked like
- Parallelism : used for checking two flat surfaces are parallel to each other.
- Squareness : To check two flat surfaces normal to each other.
- Concentricity : To check that points on a cylindrical surface are concentric to a common axis.
- Flatness : To check every element of a surface is within a specified distance from a nominal surface plane.
- Distance : To specify relative location of the various components and elements of the workpiece .
- Angularity : To specify a angle between 2 flat surfaces, other that 90 degrees
- Surface texture : Similar to flatness but concerned with irregularities in a surface rathe than straightness and alignment.
