Pinecar P378 Adjustable Weights are designed to attach to the bottom of most Pinewood Derby Cars with the included double sided tape and still leave the 3/8" track to car clearance required for most competitions. Weights are scored and can be divided with pliers so you can add exactly the correct amount to bring your car up to spec. Package contains two one ounce lead free weights. Weights could also be used to bring weight of model train equipment up to NMRA standards.
Insider tip - Scales vary so its best to make your car a little heavy for race day and then remove weights to get it to weigh in properly.