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The Crawler Crane is an intermediate difficulty Metal Earth model with 38 pieces on two sheets of metal. Cranes like this one were instrumental in building most of today's world.
Each Metal Earth model is laser etched in meticulous detail on one, two, or three 11 cm (4.33") metal sheets. Pop out the pieces by hand (or use wire cutters to get especially crisp lines), bend the tabs using needle-nose pliers, and fit them together as shown in the simple pictorial instructions. Metal Earth models are a little less challenging than our 3D wooden puzzles, but you do need some patience and dexterity because they're also much smaller. For maximum dramatic effect, display your model on the LED Display Base or the Solar Spinner (sold separately, see the Related Products tab).
Please note that Metal Earth models have sharp edges and are not suitable for children under 14.
Are you curious...?
You can't build tall structures without construction cranes. Mount a crane on top of a tracked vehicle and you have a crawler crane. Large counterweights on the back of the crane allow it to lift and move loads ranging from 40 to 3,500 tons without tipping over. Caterpillar tracks enable the crane to move around a job site without any setup and without getting stuck in soft ground. In fact, they can even travel with a load. Their downside appears when the job is finished. You can't just drive a crawler crane away. Small ones can be loaded onto a flatbed truck, but larger ones have to be disassembled and moved in pieces by trucks, rail cars, or ships to their next job.