Tolerance and Precision Contents Dimension Tolerance Dialog Box The Dimension Tolerance dialog box controls the dimension tolerance values and the display of noninteger dimensions. Examples of Dimension Tolerance and Precision You can set tolerance and precision options in the Dimension Value PropertyManager, as shown in these examples. Tolerance Rounding For the secondary units of dual dimensions, you can set the limits of the secondary unit’s tolerance range to fit within the tolerance range of the primary unit by using inward rounding so that the dual dimension does not conflict with the primary dimension. Fit Tolerances Fit tolerances are available for dimensions in the Dimension PropertyManager. Fit tolerances are used typically for shafts in holes. Example: Fit Tolerances Parent topicDimensions in Drawings