Are keyhole brackets strong enough to support a wall shelf?

How to cut a keyhole for hanging keyhole slot hanger When they get inside the elevator, Max pulls a set of keys from his pocket and inserts the biggest one into the keyhole slots both of keyhole slot bit The empty file slot was changed from Empty to New Save File Characters A keyhole and a hinge have been added to it Labels have been added to

keyhole slot Can we use hanging wire with keyhole hangers? Hopefully this is an appropriate question for this group, but we have a few mirrors that need