I don't know quite what I'm looking for but I need to do the following:
Approximately a 3' piece of something easily mountable on the ceiling.
A short (maybe 3-4") sliding movable element mounted on the ceiling piece with a locking set screw.
When set screw is loose, sliding movable element should slide easily, but not fall off.
Load (attached to sliding movable element) weighs only a few ounces.
Ideas?
Thanks!
...Jim Thompson