We precision cast Drive Tumblers that ensure correct mating with track pads, thus prolonging the life of the track assembly. Our technical personnel regularly visit foundries having the most advanced casting techniques, to personally check out the casting of the Drive Tumblers. These are then heat-treated for optimum combination of hardness and toughness. We also design and manufacture Over Pitched Drive Tumblers for mating with stretched track pads to make sure that the life of the track chains is extended.