[Human and solutions] protect your property and environment. The kit can stop a variety of birds, such as pigeons, crows, seagulls, small birds, including sparrows, starlings, black birds, grackles, , and even bats, squirrels and chipmunks. Stainless steel bird nails are harmless. Birds only avoid roosting, protect the area from falling, and avoid damaging your roof and antenna. [, long-lasting material] stainless steel spikes can be used for many years without maintenance. Once installed, you can enjoy years of bird protection. These spikes are heavy-duty stainless steel pins with a strong UV- polycarbonate base. [Flexible size coverage] each metal bird nail covers 25cm long and 2.2cm wide, so the total coverage area of each package is 10 feet. The flexible base of the nail can bend the entire 360 degrees. Depending on the width of your area, set the peaks end to end or side by side. [Multifunctional anti-bird nails] the nails can be installed in any elevated area, such as roofs, gutters, railings, ledges, doorways, eaves or any areas contaminated by bird droppings to chaos and prevent birds from building nests.