I usually use the old Home Depot Norton 4" cut off wheels. I noticed that lately the discs just do not last at all. You can burn through one in about 15" of 16gauge cutting. Anyway, I was at Lowes and needed wheels, but they only carried Dewalt brand 4" wheels. They were about the same price under $2 ea. I can tell you these things last about 5 to 10x as long as the Norton discs. I honestly went a day without changing one when usually I go through 5 or so Norton wheels. The Dewalts cut where the Nortons just turn to dust. Maybe it is just the HD Norton discs??? Thought I would pass the savings along.