HO Scale E-Z Track Curved 18 Radius Termminal Rerailer with Wire, Includes One steel alloy track with Black roadbed, The terminal rerailer is connected via terminal wires to a power pack, which provides current to power the layout, In addition to making power connections, the terminal rerailer is also designed to correct derailments that sometimes occur during normal railroad operations, Rerailers are installed after difficult sections of track (turnouts, crossings, S curves, etc, ) where derailments may occur, SKU: SPWS4675