Effective Bird Repellent: 3-Row Bird Repellent Spikes Provide Effective Protection Against Birds Installed On The Roof, Balcony, Gutter Or Railing, Effectively Prevent Birds Such As Pigeons And Swallows From Landing On Beams, Awnings Or Window Sills And Nest There And Leave Filthy Bird Droppings High Quality And Durable: The Tip And Base Of The Anti-Pigeon Spike Are Made Of Plastic High Quality. It Is Not Affected By Extreme Weather Conditions Such As Rain, Snow And High Temperature, Is Resistant To Ultraviolet Rays And Has A Long Service Life. Easy Installation: There Is A Row Of Holes Pre-Drilled Anti-Dove Nails At The Bottom, Which Can Be Fixed With Screws, Or The Anti-Bird Balcony Can Be Fixed On The Surface With Cables Or Double-Sided Tape For Easy Movement. You Can Even Cut It Into Small Pieces For Use In Tight Spaces. Anti Pigeon Balcony: If You Use Anti-Bird Thorns, It Can Effectively Prevent Your Balcony Or Gutter From Being Invaded By Birds. Other Windows, Roofs, Gutters And Other Birds. It Can Also Be Used As A Cat Balcony Protection To Scare Your Cat And Prevent It From Crossing. Package Contents: 20 Pieces Pigeon Repellent, The Pigeon Nails Are 28.5Cm Long, The Pointed Nails In Plastic Are 3.6 Cm High And The Total Length Is 5.7 Meters. Each Dove Spike Has 3 Pre-Determined Breaking Points, Cuttable Bird Spike Base Is Suitable For Any Shape And Length Of Installation Surface.