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. • 100% effective safe permanent physical barrier. • Protect surfaces from corrosive droppings. • Stainless steel won’t corrode or decay. • Sold as 1 Each.