If you are using the Dayton Audio double binding post plates, these jumpers are a must! They allow your speakers to be easily changed between bi-wire, bi-amp, or single input configurations. The innovative single-piece design transmits the positive and negative inputs through what appears to be one central conductor, simplifying installation while providing a unique high-end look. Designed to work with either the premium or fully insulated binding posts and the Dayton double binding post plates. Sold individually-- one jumper required per speaker.