This is a very durable blade. I've had an Edge Hog for 12 years, and have only "needed" to replace the blade every five years.  My home is on a large corner lot, so I have a lot of sidewalk to cover. Plus, I also use the Edge Hog to trench along where my flower garden meets the grass of the yard. My practice is to edge about twice a month, from March through October, so the blade sees a fair amount of use.