Which end condition of an Extruded Boss adds an equal amount of material to both sides of the sketch plane?

The Mid Plane end condition for an Extruded Boss is designed to add an equal amount of material on both sides of the sketch plane. This is particularly useful when symmetry is required in a part design, allowing the user to easily create a feature that extends outwards from the center of the sketch, ensuring consistency in dimensions and aesthetics.

When you select the Mid Plane option, you specify the total thickness of the extrusion, and SolidWorks symmetrically extends the material equally in both directions from the sketch plane. This feature is often used in applications where parts need to maintain balance or where mounting features are required symmetrically around a central axis.

In contrast, the other end conditions function differently. Blind allows material to be added in one direction only, Thru All extends the extrusion completely through all other bodies without regard to symmetry, and Up to Surface enables the extrusion to end at a specified surface rather than at a defined distance. These options can be useful for specific design scenarios but do not provide the balanced material addition that the Mid Plane option does.