Installed Easily: These bird spikes need to assemble and easy to install. Use nails/screws, double sided tape, glue and strong zip ties to fix the pigeon spikes on any smooth . Cutting/Trimming: Each bird spikes 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. Effective Deterrent: Long bird nest preventer paired with short spikes make birds feel uncomfortable when landing, effectively preventing small animals from nesting here and having a good deterrent effect. Durability: Our bird deterrent spikes are made of high-quality acrylic plastic, which not deform or rust, and can work well in any environment. Design-Overall: Plastic bird spikes work as a visual and physical deterrence without causing harm to small animals, effectively expelling them in a humane manner.