I have a few doorknobs in an old 1960s house we just moved into that have a loose/wiggling collar (rose?). I can remove the knob on the inside by pushing in the silver tab on the side and pulling the knob out, but I can't figure out how to tighten or even remove the collar. I'm assuming it has something to do with the small circular hole in the collar, but I can't figure out what to do with that. I've tried a hex screwdriver and just pushing a pin into that (with and without turning or pulling on the knob at the same time), but no luck. Help!
Best Answer
There's a type of spanner that amounts to a semicircle with a pin on the end. The pin hooks into the hole, and the semi-circle wraps around the shaft.
You may be able to fake it with a small allen key to fit in the hole, and tapping on the key with a small hammer to drive it around one way or the other.
This one looks to have too big a hook. Try amazon looking for hook spanner wrench and/or pin spanner wrench.