Prevent birds, like pigeons, from roosting on any landing surface, permanently! These steel bird spikes feature unique-to-the-industry center spikes to prevent birds from landing between the prongs. This feature makes Stainless Steel Bird Spikes one of the most effective bird control systems on the market. The bird spikes do not harm pigeons or other birds. They are just extremely uncomfortable to land or perch on. Steel Needle strips have been used on buildings and structures worldwide to eliminate roosting and nesting surfaces making them one of the oldest and most reliable bird repellents.