- Upgraded Bird Deterrent: This set of 20 bird spikes features varied lengths (11.8 in, 1.8 in, 1.4 in, 0.6 in) for an improved deterrent effect. Each spike measures 3.93 feet in length, providing a total coverage area of 19.68 feet to effectively keep birds away without causing harm. - Humane and Effective: The innovative combination of long and short spikes creates an uncomfortable landing surface for birds, discouraging them from perching while ensuring humane treatment. - Versatile Use: These spikes are perfect for a variety of applications including roofs, fences, window sills, balconies, and ledges. They are suitable for both residential and commercial properties, helping to prevent bird-related damage. - Simple Installation: Designed with predrilled holes, these spikes can be easily attached with zip ties, screws, or adhesive tape. No specialized tools are needed—install them in minutes for long-lasting protection. - Practical Scenarios: 1. Use on rooftops to stop birds from nesting and causing structural damage. 2. Install on window sills to minimize bird droppings and keep windows clear. 3. Apply to fences or ledges to protect your outdoor spaces and keep birds at bay. Make your property bird-free while maintaining a humane approach. Enjoy easy installation and reliable results with these bird spikes.