Sorry for the late reply. As reticent as I am I would like to state If you are striking tools not designed for the designated task then you are not doing it correctly. Also putting pipes (extenders) on stuff to add bigger fulc is no good, oem have never said use five feet of pipe to apply pressure then beat with a sledge till it bleeds. If a job is worth doing it's worth doing right, if you are not tooled up mechanically or educated to do the task you should not take it on and put others at risk. It's like the Lv guys taking on a mitz canter even for something as simple as a set of brakes and after snapping 3 of the lhf wheel studs realising they are infact left hand thread. The nuts that broke your bar were not heated or stud not froze enough. Even one eyed Fred in his home shed attempting to cross thred a nut to the point of never coming off (with the right knoladge and equipment it will come off) snap on have an unbeatable warranty, in my experience with them I have never had an issue. But in al honest after breaking not 1 but 2 power bars at the same task I would in fact be asking "am I doing this right ? Is this the correct procedure?" If so I would then approach the tool Company and ask them to address why there supplied tools for the task are not up to it? Buy better tools ! Or equip yourself for he task.

If you keep buying chinese tools they will keep breaking and even as they give you free replacements that nut will never come loose.

Ok thanks for that I was told gone &now have to see if I've still got it somewhere.
Strong possibility I've thrown it out.