This small, very powerful metal gear-set is excellently suitable for drives of model locomotives in different scales. Whether a new model railway locomotive is to be driven, or a defective gear must be replaced, this metal gear shaft fits perfectly in even the smallest models. Especially the lovers of smaller models, e.g. "1zu87", know the optimum dimensions (24 mm long x 16 mm high x 8 mm wide incl. motor) to appreciate. This version is optimum especially for flat models or when the vehicle frame is clear.The gearbox can be operated at any time on a railway transformer thanks to the very large voltage range from 2 - 18 V. Since the metal gear has a very high degree of efficiency at 7.4 V, it can also be driven at any time by battery-operated model locomotives.But also in the RC-model making the gear shows its strengths. Whether as vehicle drive or other engine-driven additional functions, the metal gear is perfectly applicable in 1:43 or larger models. The gearbox is already construc