After the recent discussion concerning broken exhaust manifold bolts, I thought about this tool to assist in removing both broken and unbroken manifold bolts.
I watched a Youtube a while back where the guy torched the existing manifold bolts to remove them in preparation to extract some snapped off bolts.
He did not want to have to extract any more broken bolts than he had to.
He also torched the snapped off bolts before grabbing the end with some locking pliers or after welding a nut on the end of the broken bolt to remove.
Every time he heated a bolt or part of a bolt, he got them out without any further damage.
I bet the cool tool would work just as good, if not better.
I'm just not too comfortable about throwing open flames into areas that might have flammable substances nearby.