SPIKES? Dense, Transparent Needle Strips Block pest birds from their "landing strips" with Bird-X SPIKES The most effective "keep off" sign you can post. Birds instinctively fly to "landing strips" such as roof ledges, windowsills, building projections, signs, statues, trusses and beams. But now you can keep them from landing on your property... Easily, inexpensively...and permanently! All it takes is an application of SPIKES needle strips from Bird-X. Theres nothing like this new roost inhibitor from the worlds acknowledged leader in bird control products. Bird-X SPIKES Nothing Comes Close! TOUGH. Long-lasting polycarbonate provides decades of maintenance-free protection. TRANSPARENT. It does the job without marring the look of your property. Its practically invisible. DENSE. Top branches protrude from the vertical shafts to give impenetrable coverage. No need to double up. FLEXIBLE. Mounts easily on flat, curved or irregular surfaces - whether wood, metal or masonry. EASY TO INSTALL. Stackable 12" sections attach quickly with SPIKES Special Adhesive, nails, screws, wire ties, etc. ENVIRONMENT SAFE AND NON-LETHAL. Nothing to rust or deteriorate. ECONOMICAL. Sturdy plastic does the same job asstainless steel at a fraction of the cost. One-foot modules minimizewaste. GREAT WORKING PARTNER. Combinations have proved more effective than any single product. STANDARD SPIKES: For most applications: 4 1/2" x 4 1/2" x 1" Available Lengths - 10, 25, 50, 100 NARROW SPIKES: For ledges 2 1/2" deep or less Available Lengths - 10, 25, 50, 100