Pine-Pro weights, the more your car weighs, the more speed it will attain on a downhill ramp. You must be certain not to exceed the weight limit as spelled out in the rules under which your race is being conducted. This weight set contains eight rectangular shaped weights. Weights may be broken apart with pliers to use separately. Four small flathead screws are included for attaching the weights to the car. Total weight is 1oz (28.3g).