High Strength Acrylic Keyhole Hangers

Are keyhole brackets strong enough to support a wall shelf? keyhole slot hanger I've goggled this Keyhole Hanger and all I can find is two screw hangers Keyhole Slot Router Bit By Stephen50 in forum keyhole slot A horizontal keyhole slot is a great hanging option if you want a painting, photograph, picture, or other decor to sit flat against the wall

keyhole slot hanger Making Keyhole Hangers from Scrap Steel DIY hidden hangers for Floating Shelves