Kato's HO Scale Unitrack Modular Roadbed Track System allows for an operating layout in minutes. Whether you're a beginner or expert, Unitrack offers hours of enjoyment and trouble-free operation. Unitrack is suitable for all types of layouts, temporary or permanent. This modular track system features an integrally molded roadbed for realistic appearance. Uni-Joiners (included) lock the track sections together for easy assembly and solid electrical connections.