Originally Posted by
phoebeisis
PPS Occasionally putting a bit in drill-and try "drilling" the wrong way-occasionally it will "grab" and screw out-no you don't need a special bit-treaded the other way-helpful but this is a long shot anyway
Right handed drill bits won't even begin to touch an alloy steel fastener when spun in the wrong direction. You can try but all you'll achieve is dulling your drill bits.
To remove a fastener with a stripped head all that's usually required is a drill bit of the appropriate size to drill the head off the fastener. Once the head has popped off the remaining stud can usually be unscrewed by hand or worst case with some pliers. If the stud happens to be stuck due to severe corrosion, then consider left handed drill bits and/or an ez-out. Just be really careful with the latter as they break quite easily at the smaller sizes and nothing but a carbide end mill and a milling machine (or lots of time with a dremel and grinding bit) will get that stub out.