Terry,
I mentioned this to forum member in a similar thread a month or so before. Do yourself a favor and buy a Starrett 162A pin vise. It will hold #61-#80 wire drill bits and run you about $15-$20 but it’s WELL worth the money. It will tighten around and hold the wire-size drill bits VERY well. (Easy to loosen, too.)
You should be able to pick one up at a production tool store in the Houston area somewhere or order it online, as with the link above. A good tool is worth it’s weight in gold.
Terry, do you really need a #81 wire-size drill bit for those grab irons? A #78-#80 will allow you to add some CA to the hole(s).
Tom