https://antibirdspikes.com/trying-plastic-anti-climb-fence-wall-spikes-to-prevent-cat-intrusions/
Trying Plastic Anti-Climb Fence Wall Spikes to Prevent Cat Intrusions | Bird Control Products...
Jun 26, 2023 - Made of durable polypropylene plastic, these fence wall spikes are designed to deter cats from climbing over them by creating an uncomfortable surface.
https://www.gettyimages.co.uk/detail/photo/woman-using-a-knotted-rope-to-climb-a-large-wall-royalty-free-image/546108697
Woman Using A Knotted Rope To Climb A Large Wall High-Res Stock Photo - Getty Images