This pack of 36 HO scale rail joiners from Bachmann Trains fits all standard track components. All of the rail joiners in this pack are made of metal. This means they'll conduct electricity and carry power throughout the block that they're positioned on. They can replace damaged existing rail joiners, and they're rated to work with the Bachmann EZ Track. They're also slightly heavier than typical rail joiners, making them a great choice for those running scale commuter lines.