This is a great inexpensive bearing press kit not intended for professionals. Keith says you can't use an impact wrench, and yes, that's the quickest way to break this tool. I used effects. carefully. with a lot of re-oiling since I've been driving (or lubricating) for a long time. But I know beats break those sets because I've already broken one. Also, this is a great set, many plates of different sizes. I pressed in 2 front ball bearings on the steering knuckles and hubs. I had to cut off the part of the bearing that was left on the hub with a grinder, being careful not to gouge it. videos on youtube. fun project. Good price. (car was Nissan Altima S 2.5L car 2004)