^Just what I needed. Thanks a million! A local HF have some 'so-so' right angle drills but are corded so it'd be one more thing to avoid getting in the way. I suppose that's fine. Thanks for the tip on drill vs adapter. I thought the same thing looking at it. A single-piece drill/tool seems much more practical than dealing with 2 separate tools. So, can I use bits like the ones you linked to start punching the smaller hole into the bolt and progressively going bigger to the point I might can back it out by using only the bits in a set set like that? My BIL has a hand-held iron punch that I can use to try to shock the threads/break some of the corrosion and I may use more of the Sea Foam Deep Creep I have for the heck of it. Aside from the technique on slower drill speed, what also in regards to a cutting fluid? You mean penetrant or something used for when cutting metal on metal?