For years I have had alway just used a ratchet to get blades off all the mowers. Sometimes I have to use a cheater bar to get them off but usually not. We have a 1/2" corded impact but it always a pain to haul out but does the job. We now have 10 mowers we have to sharpen blades weekly. The biggest pita being the new wright zk. That thing seems to fuse the blades on to the point I can not get them off even with a cheater bar. I tried the corded 1/2 impact and it will not fit between the floor and the spindle, even while jacked all the way up on my floor jack. I have always wanted a cordless compact impact but worried about the power. Well after some research I bought the most powerful one and got it for a real goood price. I got the Dewalt 1/4" 20v impact. This thing is half the size of my dewalt drill and weighs only about 3lbs with battery. Its only about 5" long. I put a 3/8" adapter in it so I could use my 15/16 socket for the Wright zk. I checked and it was so tight I could not budge it with a ratchet. I put the new Dewalt on it and it did not even strain. I really couldn't believe it. Thought I would share. $199 at Lowes with two batteries.