Package contains only 10 Bird Driver Anti - pigeon and bird nails on polycarbonate base - 4 rows The pre - perforated polycarbonate strip is very stable and can be cut optimally according to your individual needs thanks to its pre-perforated breaking point. Polycarbonate sticks are made of UV resistant plastic. Pre-cut holes allow for quick installation without using a drill bit. 4 rows of anti-pigeon spikes protect an area up to 20 cm wide. In addition, they protect animals because they are designed not to harm animals. Pigeon and bird droppings can cause serious damage to buildings. Our polycarbonate bird and pigeon spikes provide effective protection against birds, especially pigeons. The spikes fit discreetly into the contour of your facade to give your property a neat look and prevent major damage from pigeons and bird droppings. They can save you time, money and a lot of hassle. Installation Polycarbonate rods can be easily split by their pre-cut breaking points to meet your individual needs. Thanks to our specially designed adhesive, the pigeon spike can be installed more easily to immobilize the spike against bird droppings. The protective surface must be free of dust and grease. It is recommended to pre-treat surfaces such as stoneware with our primer (treatment and cleaning of porous and impregnated surfaces) to ensure a firm and secure bond. Assembly can be done by screws or nails.