Arrgh, they call em blades don't ya know. It's a wheel broken into 4 sections and each section has three carbide tipped cutters. This one I got on e-bay has the cutters (blades, whatever) worn down to nubs where if I were to sharpen them I'd be going into the steel. So thats what I mean. If you look on Praxis website (which takes you to Vermeer) they call em blades. Anyway I finalyy got a number to call so I can get new "blades". Thanks