The tip, base and screws of the anti-pigeon spike are all made of high quality SUS304 stainless steel. It is not affected by extreme weather conditions such as rain, snow and heat. 5 times longer life than plastic or silicone anti-bird spikes. The height of the anti-pigeon bar is about 11cm, and the distance between the two ends is adjustable. You can adjust the spacing of the bird nets according to their size to prevent birds from roosting or nesting. : If you use bird nail, it can effectively prevent your balcony, garden, roof, window or gutter from being invaded by pigeons, crows, swallows, herons and other birds. It can also be used as a cat trap to scare your cat and prevent it from passing. The Pigeon Nails are made up of 15 pairs (30 needles) of 25 cm long pieces. Box of 10 sticks. The base of the anti-pigeon spike has a row of pre-drilled holes that you can quickly install using zips and screws. Foldable and cuttable, the Bird Nail Base is suitable for any shape and length of mounting surface.