Physical barriers are the most effective way to keep birds off. Wherever applied; physical barriers eliminate the ability to land and perch. Stainless Steel Spikes install easily with Special Spike Adhesive, nails, screws or ties. Prevent birds from landing anywhere! Protects rooftops, ledges, fences, and more! Bird-X’s Stainless Steel Bird Spikes are made of durable stainless steel, and require zero maintenance. Stainless Steel Bird Spikes provide total pest bird protection, and can last a lifetime.