EFK3 Simple Machines Kit

Contains one of each of the Centrifugal Force, Pulleys, Gears and Drive Systems Kits, plus four Base Units.

EF-BU Engineering Fundamentals Base Unit / EF-3.1 Engineering Fundamentals Cam, Crank and Toggle / EF-3.2 Engineering Fundamentals Simple Mechanisms / EF-3.3 Engineering Fundamentals Additional Mechanisms / EF-3.4 Engineering Fundamentals Bar Linkages