1954 Chevrolet 3100 Truck (14-03) M2 Machines Ground Pounders Release 12 Castline Premium Edition 1:64 Scale Die-Cast Vehicle 1954 Chevrolet 3100 Truck (14-03) M2 Machines Ground Pounders Release 12 Castline Premium Edition 1:64 Scale Die-Cast Vehicle Ground Pounders - Driving into the Future! They are high performance vehicles with styling you've never imagined. Hammered to the ground and massaged to bring out one sweet ride, these slick rumblers are destined to wake the neighborhood. 1:64 Scale - Vehicle measures approximately 3 inches long. Die Cast Body & Chassis. Rubber Tires. Ages 8 and up. From Castline.