Block pigeons, starlings, blackbirds and seagulls from their favorite landing and roosting surfaces with ORIGINAL Bird-X Stainless 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, windowsills, gutters, roof perimeters, chimneys, support structures, awnings, poles, lights, trusses, building projections and anywhere else birds roost. 24 kin. ft. per box.