Block pigeons, starlings, blackbirds and seagulls from their favorite landing and roosting surfaces with the Bird-X stainless steel bird spikes. Tough, long-lasting polycarbonate and stainless steel material, provides maintenance-free protection. Stainless bird spikes won't mar the look of a building. The spikes function as a "keep-out" sign for permanent bird control. Spikes are easy to install with adhesive (not included). Each section of spikes covers a "spread" or width of up to 6-in. Ideal for ledges, beams, rafters, railings, air conditioners, signs, gutters, roof perimeters, chimneys, support structures, awnings, poles, lights, trusses, building projections and anywhere else birds roost.