This is a top-of-the-line mechanical wooden 3D-puzzle of the all-wheel-drive tractor Kirovets K-7M. The tractor has a rubber-band which makes the tractor go forward and backward, free-wheel gear, start-stop system. The rubber-band opening mechanism of the hood shows the realistic six-cylinder inline engine. Doors open and close. Connects with a trailer sold separately. Eco-friendly sustainable material made of FSC certified wood. Very high precision laser-cut plywood with amazing details. All inclusive boxes, self assembly. No messy glue required. Clear colourful step-by-step assembly instructions. Model includes candle wax for gears, sand paper and rubber bands. Very sturdy construction.