This is a variation on a Stopped chamfer Inventor iFeature. This version of a stopped chamfer has curved ends, like you might get with a router, spindle moulder or spe shave.
Download this iFeature to create a stopped chamfer on the edge of a timber rail.
Autodesk Inventor's iFeatures are a handy time saving tool, that allow you to save a feature (or a set of features – even a whole part) out to a separate file so that you can re-use it later.
This post shows you what to do with iFeatures that you downloaded from the Internet...