This small, very powerful metal gearbox kit is ideal for driving model railway locomotives in various scales. Whether a new model locomotive needs to be powered or a defective gearbox needs to be replaced, this metal gearbox fits perfectly even in the smallest models. Particularly enthusiasts of smaller models, such as those in 1:87 scale, will appreciate the optimal dimensions (24 mm long x 16 mm high x 8 mm wide including motor). This version is especially suitable for flat models or when there is an unobstructed view in the vehicle frame. With a very wide voltage range of 5 to 18 volts, the gearbox can be operated at any time with a railway transformer. Since the metal gearbox already exhibits a very high efficiency at 7.4 volts, it can also power battery-operated model locomotives at any time. Additionally, the gearbox shows its strengths in RC modeling. Whether as a vehicle drive or for other motor-driven auxiliary functions, the metal gearbox is perfectly usable in models scaled 1:43 or larger. This is a kit with detailed instructions, allowing the drive to be easily adapted to individual needs, for example, as a winch in ship modeling with a single-sided output shaft or an extended axle for a wider gauge.