Cabinet hanger, For mounting in drilled hole, keyhole slot

Are keyhole brackets strong enough to support a wall shelf? keyhole slot hanger Key Hole Hanger with Raised Slot (10 Pack with 20 pcs 12x 4 Flat Head 60 Pieces Round Keyhole Hangers Metal Keyhole Hanger with 120 Pieces Mounting Screws keyhole slot Keyhole slots are a great way to affix wooden hangings, such as a shelf or picture, to a wall But if the mounting screws aren't perfectly

keyhole slot plug Dritz Wood Keyhole Slot Quilt Hangers Shipping calculated at checkout This product is unavailable Ready to stain or paint Ready to hang with keyhole slot