it would be very useful if inventor has this constraint.
A width mate centers a tab within the width of a groove. Groove width references can include: Tab references can include: Two parallel planar faces Two non-parallel planar faces (with or without draft) One cylindrical face or axis
| ![](http://help.solidworks.com/2012/English/SolidWorks/sldworks/doc1292868870872.image)
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Examples:
![](http://help.solidworks.com/2012/English/SolidWorks/sldworks/doc1292868871341.image)