It’s the details.

This is a trim piece. It’s part of the oak band that goes atop the wainscot in the bathroom. It needs to be tapered at 14 degrees for 7/32 of an inch, and have a 1/4 inch cut on its interior end. Without this little piece, a corner in the bathroom would look unfinished. When you’re doing custom trim work, little pieces like this come up all the time.