Description
Pinewood DerbyEasily molds to any shape, so you can use it anywhere on your car no matter what design you have. Tungsten is 1.8 times heavier than lead so it adds lots of weight in a small area. Tungsten putty is child-safe, there are no toxic materials in it. Saves you time because you can easily add just the right amount without breaking off weights or finding just the right size.