This PineCar chassis weight is designed for four-wheel-drive Pinewood Derby cars and adds approximately 2.5 oz to bring your car closer to the maximum allowable race weight. The weight is cast metal and styled to resemble a realistic automotive chassis, fitting into the underside of the car body for a clean, detailed look. It allows incremental adjustment so builders can fine-tune their car's total weight. Features: Approximately 2.5 oz cast metal weight Four-wheel-drive chassis style Mounts to underside of Pinewood Derby car body Realistic chassis detail Supports incremental weight adjustment 7/7/26 cs