How It Works High quality Stainless Bird Spikes are 100% effective at preventing pest birds from landing, nesting, or roosting on selected surfaces. By installing the spikes on surfaces where pest birds like to perch an uninviting, irritating, & intimidating barrier is established, forcing them to relocate. Stainless steel spikes are humane and only require a single application for years of efficacy. Pests Repelled Stainless Bird Spikes effectively repel pigeons, sparrows, starlings, crows, blackbirds, grackles, & swallows amongst many other pest birds. Where to Use Stainless Bird Spikes are effective wherever they are applied such as homes, garages, rooftops, windowsills, signs, billboards, ledges, playgrounds, beams, yards, gardens, gates, fences, barns, & more. Installation Installation for Stainless Bird Spikes is easy and can be done with bird spike adhesive, nails, screws, or ties. The flexible base of the spike strip allows these spikes to be installed on straight, curved or uneven surfaces. When applied correctly, Stainless Bird Spikes are 100% effective in repelling birds 24/7. Quality can last a lifetime with stainless steel material that wonât corrode or decay, purchase of this product includes a 10 year manufacturerâs warranty. This set includes 50 linear feet of stainless steel spikes that measure 4.5â deep (for 5â effective depth coverage), sent as 25 two-foot linear segments.