Keyhole Hanger, Pack of 40, Lens Head Fittings, Metal Keyhole Hanger, Keyhole Hanger, Metal Picture Hanger for Picture Frame, Mirror, 2 Colours, 43 x 16.3 mm : Amazon.de: DIY & Tools
Drywall anchors + keyhole bracket : r/DIY
Steel Keyhole Hanger Plate – Hardwick & Sons
Heavy Duty Keyhole Hangers for panels: Can you recommend? - WetCanvas: Online Living for Artists
Keyhole hangers Round METAL recessed mount insert bed connector picture mirror frame bracket 30mm x | Keyhole hanger, How to fix a mirror, Mirror frames