Weighing your derby racecars to the maximum weight allowed helps increase their speed. Use the designer PineCar® weights to effectively add that extra weight to your racers. These derby car weights can be attached to the sides of the cars with a double-sided tape. With their unique style and shape, these PineCar speed accessories add to the look of your racecars. Tune them to the required weight by cutting them with a razor saw or hacksaw. This pack comes with 2 stick-on weights of 1 ounce each.