drill SQUARE HOLES Japanese form tool

This will defy everything you KNOW Triangle shaped formed tool will drill SQUARE HOLES. Amazing concept, but from the sound of the impacting cut I ll bet the mill head is short lived. The square holes need to be roughed out first with an undersized drill bit. The offset triangular form tool doesn t appear to be able to plunge that fast, the video says 200 in, min. One advantage this tool has is being able to make a very deep cut relative to a small corner radii. I also see a problem with keeping the square shape parallel to the sides of a workpiece.