and am I nuts trying to fix this small bracelet?
Probably, Barbara… It’s not hard at all, if you know what you’re
doing, but it’s fine work. Most tennis bracelets - "line bracelets"
use around a #72 drill bit for the hinge pins, which is something
like.8mm, as I recall (I’m in the mountains, right now…). I don’t
use gauges, but you can find that in any book, what gauge.8mm is. You
need to drill it, put in a new pin, and solder it with (usually) easy
solder. That takes a little torch… You can use a solder stop,
like yellow ocher, but it’s almost more difficult to do it that way.
Otherwise you end up with a frozen link… Take it to a pro…