Use a left-hand drill bit to grip and remove the bolt. If that fails, try an easy-out extractor. For stubborn bolts, heat the surrounding area to expand the metal and break the rust bond.

The Stroton cobalt bits for metal featured a round shank with a low-profile stepped split point. ... Cobalt left hand drill bits are also available, although not as prominent.

Profanity is often the first impulse after breaking a bolt. I completely understand. After that, try these ideas. If it’s not a situation that requires immediate repairs, soak the area for 24 ...