Gain a competitive edge and make your Pinewood Derby® racer run faster. The weights are sectioned off into different sizes, allowing you to easily fine-tune your car per race regulations. Use glue (sold separately) to safely secure the weights to your car's chassis. Pliers and glue required. Includes: 1 set of 2.8 oz. Round Chassis Weights. Length: 2.8". Width: 0.3". Weight: 2.8 oz. Age: 8+