Can't beat this
My first job out of high school back in the late 70s was an equipment rental center, where I sharpened more lawnmower blades than I could count. The company I worked for had one of these, but I couldn't remember the name. When I went to Amazon looking for one, I searched for "magnetic lawnmower blade balancer" and they had several cheap imitations. Sure glad one of the reviews said "skip the cheap imitation, get the Magna Matic Mag 1000". Aha! THAT was the name of it. Mine just arrived, and it works every bit as good as I remember from all those years ago. Sure glad I found you and didn't have to settle for the cheap imitations on Amazon. If you have a nice mower and want to take care of it, the Mag-1000 is worth every penny!