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! Provides 100% protection on 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.