| OK, wizards - here's a situation I can't find a good solution to. I have a
| Yale deadbolt in my back door, and want to replace with a KwikSet. The
| backset (from edge of door to center of hole) is correct for Kwikset, but
| the hole's size is too small. It's about 1-3/4", and the Kwikset requires
| 2-1/8". I've got the right size hole saw, but without solid wood for the
| guide bit, I can't see a way for the saw to work correctly. Using a saber
| saw is a possibility, I guess, but I wonder if there's something more
| elegant, as opposed to turning this into a cob job.
| Anyone got a cool trick?
Starrett has a special "Oops" arbor (seriously, that's the name) that lets
you use one hole saw as a pilot for a bigger hole saw. It has a 1/4" shank
and threads for both saw sizes. I think you might be better off just clamping
a piece of wood over the hole as others have suggested, though. When my
locksmith did this he used his normal lock jig. Versions of that are available
at home stores.