We sell lots of Tungsten Buffer Weights in the standard size (1.5 oz.), but have been asked by many of our clients for an easier way to tune to even tighter tolerances.... Pur-Tungsten's solution are these Short Tungsten Buffer Weights!!!! Our Short Weights are just a 2/3 of the length and weight of the standard size.... This allows you to tune and adjust precisely. When you are looking for a specific weight that falls somewhere in between the H-H2-H3 levels, our tungsten mini weights are the perfect answer....Tungsten is one of the heaviest and densest metals found on Earth. It is also one of the hardest. This makes it very difficult to cut with standard tool sets.... If you've ever tried to cut one of our standard size tungsten weights down a bit, you know that it certainly isn't the same as cutting steel.... We are a top manufacturer of tungsten products. We have the facilities, tooling, and know-how to produce exactly what you need!!!! Whether in the Cub Scouts, Webelos, Boy Scouts, Girl Scouts, Earth Scouts, Adventure Guides, Pathfinders, Navigators, Pioneers, Royal Rangers, Alert Cadets, Columbian Squires, Trail Life, DeMolay, or any other forms of Scouting, we all love the Pinewood Race!!!! The acceleration due to gravity is a constant. The more mass, the greater the force acting to accelerate your racer. This force is competing against the forces exerted by aerodynamic drag and friction, so you want as much mass as possible to increase acceleration force.... Official Rules limit Pinewood Cars to a maximum weight of 5 ounces, but check the rules for your local contest to be sure.... Most Pinewood Cars weigh between 1.5 oz & 3.5 oz (depending on design) without any added weights, so a Pinewood Car may need up to 3.5 oz of extra weight.... The heavier your car is, the faster it'll be, but the location of that weight makes a difference.... The best placement for center of gravity is 1/4" to 1" in front of the rear axle. Go too far forward and you lose potential energy, too far back & your car will lift its front end..... Tungsten is best for this because it's so dense, allowing for precise placement & tuning.... Give yourself or your child the best advantage by using our Tungsten Weights for your Pinewood Car racer....