Effective Deterrence: The long and pointed bird nest guard is paired with short spikes, which makes the birds feel uncomfortable when they land, effectively preventing small animals from nesting here, and has a good deterrent effect. Cutting/Trimming: Each bird spike can be divided into the size you want according to your needs, such as fence/roof/corridor/wall/shed/balcony/eaves/garden or some narrow places. Durability: Our bird proof spikes are made of high-quality acrylic plastic, which will not deform or rust and can work well in any environment. Easy Installation: These bird proof spikes only need to be assembled and are easy to install. Use nails/screws, double-sided tape, glue and strong cable ties to fix the pigeon spikes on any smooth surface. Overall Design: Plastic bird spikes have visual and physical deterrent effects, will not cause harm to small animals, and can effectively expel them in a humane way.