Bird-B-Gone Stainless Steel Bird Spikes are an effective humane solution for deterring large birds from landing in unwanted areas. Birds cannot land on the un-even surface created by the spikes and will move on to a better spot. Bird-B-Gone spikes are sold in two foot sections 50 feet per box and are available in a variety of widths to cover the surface to be treated. Bird-B-Gone Stainless Steel Bird Spikes come in two-foot sections 50 feet per box and are made of stainless steel pins in a U.V. protected polycarbonate base. The base of the spike strip is 1.5" wide and can be glued nailed or tied down to most surfaces. Recommended by Architects Contractors and Government Agencies. Patented Bend and Crush Design for Permanent Installation. Fits Any Contour - Can Bend 360 Degrees. Will Not Cut or Injure the Installer. Longest Guarantee - 10 Years. Install with Screws or Adhesive. Size: 8- 50ft.