Went out to change the blades on our 60" Lesco ZTR. First problem was that the spindle nuts were 1 1/8". Had to go to the store and get a socket that size. Next, I put my trusty electric impact wrench to hammering away. To my amazement, those nuts wouldn't bust loose. No problem---on to the air impact. Guess what? That wouldn't bust 'em loose either. What to do. What I did do was get a long breaker bar, and a 4' pipe cheater handle. The big probelm, of course, is how to hold the blades while you romp on the breaker/cheater bar. Nothing I tried in the way of jamming techniques had enough purchase to hold against the breaker/cheater bar. I ended up fetching a piece of chain. One end went around a front axle, the other around whichever blade I was on. This gave me the purchase I needed. Once the nuts budged, I was able to run 'em on off with the electric impact. Hope this helps someone.