The belts that my Worksharp knife sharpener came with are 80, 220, and 6000 grit. The 80 is a bit too aggressive for knives unless you're planning on removing a lot of metal, and I think the 6000 is a bit worthless. I suppose it's supposed to be a bit like a leather strop, but jumping from 220 to 6000 doesn't seem to work all that well. Personally, I'd want 220, 400, and 800.