Flock Free Universal Adjustable Spike is a unique device that provides an excellent solution in keeping birds off of your property. These adjustable spikes are constructed of high-grade 302 stainless steel which offers durability and corrosion resistance. The spikes are attached on sun-resistant plastic, providing sturdiness and flexibility. It can be adjusted between one inch to eight inches which allows easy deterring of both small and large birds, with tall center spikes intended for catching larger birds. This product can be easily installed on most surfaces using screw or glue, plus it also features a flexible base that lets you secure it on curved areas. It works on different types of birds such as pigeons, starlings, sparrows, crows, blackbirds, grackles, swallows, gulls and crows. Can be placed on different locations including homes, rooftops, garages, windowsills, billboards, beams, signages, rafters, and more. This specially designed tool helps reduce cleaning and repair cost, plus minimizes health risks that go with bird pest infestation. It also eradicates possibilities of fire hazards caused by the building of bird nests in chimneys and vents. Comes in a box with 50 spikes that are 2 feet long, totaling 100 feet.