Humane Unlike similar products, Bird-Flite's spikes are blunted, preventing injury to birds or unsuspecting workmen. No Debris Bird-Flite's wires are spaced 1.5 inches on center-far enough apart to repel pigeons, yet avoid entrapping debris Easy to Install The base can be glued or screwed in place. Available in one foot lengths, each section can be broken into smaller sections to accommodate any architectural configuration. Visibility The clear plastic base and thin stainless steel rods are nearly indiscernible from even short distances.