I have the 10" Magnum wheels that are 1" wide. It doesn't seem like it should but you get a nice convex edge from them. I think it may be due to handholding them and the edge is not held perfectly flat. I'm pretty sure RichardJ has mentioned the same thing on BF. It's not a full convex like you'd get from using a belt sander on the entire blade, but the edge on mine is a convex.