It's one thing to read the specs on the steel, but it's another when you use it. I was using my HAP40 Delica to cut fasteners for vinyl siding that was badly faded (lots of them). I also had to cut some of the new fasteners short so they would fit in the masonry. It still has a pretty good edge. That despite slipping and hitting the bricks. Definitely would have killed the edge on my VG10 Delica. Although I kind of thought of it as a collector, the HAP40 Delica a great work knife.