"charles cashion" wrote in message
...
All of the door knobs in house are brand Dexter. The knobs are approaching
25 years old. They are all mounted in 1 7/8" holes.

Q1: Are there other door knob manufacturers that make 1 7/8" hardware?
If the answer is NO, then I must enlarge my present holes
to 2 1/8".

Q2: How can I hold a hole saw steady and centered while it is
enlarging a 1 7/8" hole to 2 1/8" ?
Thank you,
Charles

Ther are a couple other methods that have not been mentioned. You can make a
tight fitting plug from a piece of 2"X2" or 2"X4" lumber (or a tree limb)
and redrill with the larger saw. I once was able to put two hole saws on the
same arbor with the smaller one sticking out farther for a guide. It didn't
work great, but I got the job done.

Don Young