Compatible with 6 x 5 x 3 pullback motors.Pullback motors provide superior power and torque and are ideal for a variety of applications.With pullback motion or winding mechanisms to power Technic, it can serve as a reliable power source for Technic or other Technic projects.The multi-function Power Motor is fully compatible with the Pullback Motor and provides exciting play for the Technic Car Toy Kit. Create pullback racing toys that challenge young minds. Build pullback racing toys for hours of fun.