Win by 3+ car lengths: itu0026#39;s science. When these weights are place toward the rear of your car, you will have more potential energy because your center of mass is higher up on the track which will result in maximized kinetic energy at the finish line.nStep-by-step digital build guide for apollo 2000 pine car: our digital pdf build guide (e-mailed to you within 24 hrs of order shipment) will show you how to build the apollo 2000 pinewood derby car. With 22 pages of detailed instructions and illustrations, this guide will cover body design as well as exact tungsten weight placement to achieve a 4. 8 oz derby car with an ideal center-of-gravity for maximum speed. The final 0. 2 ounces are added on race day using the official scale.nMore weight for your money: 3. 25 oz instead of 3 oz! This means you can locate even more weight to the rear of your derby car for maximum speed.nHigh density u0026amp; non-toxic: our tungsten is of 99. 95% purity and is 1. 7x denser than lead, meaning that it can add significant weight while maintaining a small footprint. Being non-toxic makes our weights safe to handle as opposed to lead.nEasy installation: simply drill a 3/8 inch hole using a standard electric drill, insert your weights and glue in place. For the ultimate in stealth design, cover the weight holes with wood filler, sand smooth, and paint, keeping your speed secret safe.nLooking for that winning edge? Our tungsten weight set will maximize your car's speed by allowing you to increase your car's weight to the limit while also placing that weight in the most advantageous spot on the car, high and towards the rear. Each set consists of 8 weights with the following specs: (5x) @ 0.50 oz. (3x) @ 0.25 oz.