Our Bird Repellent Spike is made using high quality stainless steel material and cutting edge tools to provide accurate shape. It is used worldwide to keep pest birds away from roosting as well as nesting on building surfaces. The spike is not harmful, it is just irritating, uninviting and intimidating. Repellent spike is long enough but not sharp, it will make perching of birds difficult and they will just go away. Bird Repellent Spike is widely used in homes, billboards, windowsills & yards.