What does the Fillet feature do in SolidWorks?

The Fillet feature in SolidWorks is used to create a rounded edge between two faces or edges. This tool is important in CAD modeling for several reasons. First, it helps to improve the aesthetics of a model by smoothing out harsh edges, which can be more visually appealing. Second, from a functional standpoint, rounded edges can reduce stress concentrations in a part, making it less likely to fail under load. Moreover, fillets can facilitate assembly and manufacturing processes by preventing sharp edges that could damage other parts or make handling difficult.

It's essential for designers to understand how to effectively use the Fillet feature, as it can impact both the design’s performance and its manufacturability while enhancing its overall functionality and appearance.