Bulk up your Derby race car and put up a strong fight with the PineCar® 4-wheel drive chassis. This Derby weight can be easily installed in your Derby vehicles. Its realistic look makes the underbody of your cars look similar to that of real sports cars. In addition, the incremental make of this lead-free chassis weight lets you install precise weights according to preference. This pack contains a 4WD chassis, weighing 2 ounces.