need advise bolt removable

With any broken bolt.. first thing I do is center punch as close to dead center as I can.I'll hit them pretty hard too which will undo atleast some of the thread stretch. Next I spray it with wd-40 and use a tiny punch off center to peck at it in the outward rotation. If it moves I know I can back it out this way and often drop the punch and hammer . Scratched them out with a dental pick.