Pinewood racing is a wood-based, unpowered, fully gravity-accelerated racing game. Our tungsten alloy counterweight package has 2 different sizes of tungsten cylinders. Mounting the tungsten blocks on the car can maximize the weight of the car, thereby improving the acceleration of the car's descent; placing different tungsten blocks in different positions can increase the car's weight The balance and stability make your car faster and more stable. Our tungsten alloy weight packages have given many of our customers' cars great results and fond memories at the Pinewood Derby racing. Specification: 1.Material:Tungsten 2.Package include : 4 pieces of 1/2 oz and 4 pieces of 1/4 oz Cylindrical Tungsten Weights, 1 piece of 1/2 ounce tungsten putty, 1 plastic case