Most of you will roll your eyes, but bear with me for the benefit of others. If you are still using the hard grinding wheels on your 4"grinder for sheetmetal or body work or just about anything. Try the new flap wheels they have out. I am welding in new floor pans. The welding supplier put me on to em. For things like that, they are SO much better. I still have the hard ones on the shelf, but find I don't bother switching as these take metal off faster than you would think. They are cheap, use 40 grit and 60 for fine work. They don't gouge, better control, and are safer.
