Is there a particular type of route this is designed to perform? Different bits?
Mostly it's used for fielding down. I've used mine mostly for making hinge mortises, but also for
cleaning and evening dados. It also works for inletting when carving bas relief and making a
flat surface below the top of a piece of wood -- like the finishing bottoming for a box to hold
a sharpening stone, or things like making the recess under a patch-box in rifle stocks.
Blades are mostly different only in the width of the blade, but there are blades that aren't
flat across the edge. These may have a skew edge, or, more commonly, are skewed
on both edges to a V shape. While other shapes can be imagined and useful in some
applications, the above are the only shapes I have seen.
