Purchased these because I wanted a better quality blade so I was wiling to pay a little more. I installed and used them since the beginning of this cutting season and have a gravel driveway so you know what that means. I was doing regular maintenance cleaning the deck and usually I sharpen the blades but when I examined these I really couldn't believe it because I know I hit some pretty bad gravel few times but very minor denting on the edge and still sharp looking almost new! Definitely recommend these blades.