The useful spikes from the KADAX brand effectively prevent birds from leaving droppings on windowsills, as well as from perching and nesting on cornices, balustrades, or roofs. They can be securely mounted to gutters using gutter handles. The spikes deter starlings, pigeons, crows, and sparrows. This is a great solution for any home, protecting architectural elements from soiling. The wide spacing and special arrangement of the stainless steel wires allow us to secure particularly wide cornices and windowsills and effectively deter birds. The spikes prevent nesting by smaller and larger birds, as well as martens. These animals can transmit diseases or pathogens dangerous to humans. The spikes have blunt, rounded ends, so they don't injure birds. The particularly dense construction is suitable for areas with a high bird population. The product keeps windowsills, facades, and walls clean by protecting them from bird droppings. When properly installed, the spike system is very effective