Key Points
By default, profile tolerance specifies a uniform tolerance zone equally distributed about the true profile defined by the basic dimensions. All elements of the surface must lie within the tolerance zone. An arrow from the feature control frame must point to the surface or extension line.
Example Drawing
How to Read It
The tolerance zone established by the profile of a surface control is 3D and extends the full depth of the feature. The between symbol extends the tolerance to all surfaces between points X and Y.
