Review on Delta Diamond Extreme 4-1/2-Inch Metal Cutting Diamond Blade: The Ultimate All-Purpose Heavy Duty Grinding & Cut Off Wheel for Rebar, Sheet Metal, Angle Iron & Stainless Steel by Bill Sorenson

This blade is no joke, highly recommended. I used it for the first time today and it cut through #4 rebar with no oil, like a snap. Serious product, will definitely buy again and check other products from this company. Just a small setback that isn't huge BUT REMEMBER YOU MUST REMOVE THE SMALLER PERFORATED INNER CIRCLE FOR A PROPER FIT. It doesn't look perforated and they don't mention anything about it either. Still 5/5 stars for the high quality blade. I hope life lasts as long as they say.