The Atlas HO Scale fully assembled 21-Stall Turntable, is a 9" 22.8cm diameter turntable with the ability to stop at 21 positions, 15 degrees apart. Geneva movement locks table in exact position every time. Simulated wood brown turntable deck and concrete pit ring look at home in your engine terminal. This turntable is designed for surface mounting with no cutting into your layout base necessary. It features manual crank operation or can easily be motorized for remote control operation with the 150-304 Turntable Drive Unit, sold separately. The 21-Stall Turntable is one of many Atlas HO Scale structures.