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