Pinewood Derby Car Weights - 3oz Tungsten Incremental Cylinders (3/8") for Speed Optimization | Perfect for Cub Scouts Racing & Pinewood Derby Competitions

Accurate weight Our tungsten is of 99.95% purity and is 2.7 times more dense than zinc and 1.7 times more dense than lead, meaning that it can add significant weight while maintaining a small footprint.

Size The weights size are different, there are 4 of 1/2ounce, 3 of 1/4 ounce and 2 of 1/8 ounce, all tungstens are 3/8 inch in diameter cylinders.You can match the speed you need to increase according to your needs

Easy to install the cylinder is 3/8 inch in diameter(standard drill bit size), you can just drill a hole, insert the weight and paste it in place to use

Safe material tungsten is child-safe, non-toxic for safe handling,the surface of all counterweights is smooth and cylindrical, safe and without sharp edges

Package included each set includes 9 pieces of tungsten weights of 3 sizes with a sum of 3 ounces, they have no sharp edges, non-toxic, safe for people to use