These Atlas Trains O scale terminal joiners connect track sections to a power source, allowing you to feed electrical current to your layout. Sold as a pair, they are designed for use with O scale track at the standard 1:48 ratio. Terminal joiners are a simple and reliable way to add power feed points around a larger layout to maintain consistent electrical contact. Features: Sold as a pair O scale 1:48 compatible Connects track to power supply leads Metal rail joiners with pre-attached wiring 7/7/26 cs