I don't break edges with a trimmer

I don't chamfer edges with a trimmer because it doesn't give a nice sheen. That's probably the main reason. After planing the surface, if you use a trimmer just on the edge, it feels a bit off. So I always use this tool instead. You can change the size quickly, and it lets you cut clean, consistent chamfers at the same size Japanese carpenter working on site Traditional Japanese woodworking Using Japanese hand tools Carpentry work in Japan