For 3/8" tool holders this is amazing! They have no problem with fairly aggressive cuts for their size and leave a great finish. Just today I tried my luck with one of these and a .150 made a deep cut about 1/2" long on the 14 pieces I had to cut. in. The panel is still good and the finish was as good as I expected them to be with the original panels. Plane cutting goes with it also very good, i can make a depth of cut of about .200 and the tool just laughs at the steel and lets it fly!