Every person I demonstrate this wheel to stands with their mouth open or starts using words I can't repeat here. I have always used Norton but no more. United abrasives general purpose Sait .045 .. 6"x .045 x 7/8... 1/type 41.. I can cut through .250 thick 2 inch angle iron faster than you can walk to the band saw!!! I am amazed every time I use this wheel. Inch and a half by .125 thick mild steel takes about 2 seconds. Not 2 1/2 or 3. I thought I would give it a good test cutting 304 stainless tubing 1 inch x .120 wall. It cut like butter. Now the best part. I have used this wheel for about a month and it is 5 1/4 inches dia. instead of six. After you try one you will throw away the rest.\