This 5/8" cutter has some significant problems, starting with the design. The steel may be tool steel, but it is a SOFT tool steel that sharpens and dulls quickly. flat, short, and the initial sharpening is useless. The tip is decorative as it is made of thinly coated steel. Nevertheless I have resharpened the tool and it has gained a very good edge and will (in its short life) be a useful tool. I say short life because with my sharpener the flute is used as a reference and the flute is soβ¦