They act as a visual and physical deterrent which don’t allow animals to have access to a certain covered area. The size of each bird spike is 9.7" length X 1.1" width X 4" depth. WIDE APPLICATION FOR VARIOUS SETTINGS: These stainless steel bird spikes are suitable for fences, roofs, window sills, balconies, patio covers, air conditioners, and other ledges where birds and small animals tend to perch.
eBay