How to remove a broken bolt in a deep hole, remove broken bolt in recessed hole

It can be difficult removing a broken bolt or stud that is recessed in a deep hole as there are not many techniques to remove the bolts. Before attempting to remove any bolt, it is a good idea to shock the bolt first, then apply some heat and finally some spray penetrant (once it is cool). Drilling out the bolt is one of the few options that will work in this scenario. In this video I show two techniques that could potentially work when a bolt is broken in a deep hole or a bolt is sheared in an aluminium co