These small but powerful engines were a favorite with mining and logging operations, where light rail and bridges, rough track and sharp curves presented problems for standard engines with tenders. To increase their flexibility and pulling power, these locos carried all of their water in a round top "saddle tank" above the boiler, which put more weight where it was needed on the drivers. Fuel was carried in a small bunker directly behind the cab. Typical of engines that ran from the 1900s to the end of steam, these ready-to-run models are complete with spark arrestor and oil bunker. Other features include:
 
* MRC dual-mode sound decoder for use on DC or DCC layouts with 28 accessory functions including bell, horn, whistle, brake and chuff sound * Metal body, chassis, handrails & brass bell * Powder die cast metal wheels on front & rear trucks * Metal cylinders & wheel inserts for greater pulling power * Flywheel drive with universal ball shaft for smooth running, enhanced performance * Working front and rear headlights * Collector's gift box