Build the Screw Lift from over 170 VEX Robotics pieces! Connect a series of gears and cranks with precision to power and transport balls between five holding bins! Discover the excitement of engineering with the VEX Robotics Screw Lift Ball Machine by HEXBUG. Inspired by the original design of one of the greatest scientific minds of Ancient Greece, this modern machine puts a fresh twist on the Archimedes Screw from the 3rd Century B.C. This system is time tested and still used by many industries to move small objects or liquids. Collect and connect all of the VEX Robotics Ball Machines!