The BIG RIG 18WHLR is the biggest KnuckleStrutz construction set yet! With its 340 pieces you can create 10 additional models from the included instructions. Even our famous building toys like the KS-Raptor, the Xenobot, and the Dune Racer can be built from this mega building toy! You can also use all of its pieces together with its 18 gears and tires to build amazing creations that the world has never seen before!