The little Y-shaped hangers that screw into the wall, with the rubber coating, for hanging tools like rakes and hoes in the garage (my wife thinks a good song title would be "I Was a Rake, and She was a 'Ho," but I probably don't beat her enough) that you can get in any hardware store, are just too narrow for guitar necks, but work fine for mandolins, octave mandos, etc., etc.

Peter.