The Diamond Z line of tub grinders includes eight models, which range in horsepower choices from 425 to 2,000. The mid-range Model 1460B has horsepower choices of 1,000, 860 and 800 from Caterpillar engines. This 60,000-pound machine has a tub diameter of 14 feet and 3,960 square inches of screen surface. The grinder is designed to process stumps and logs, brush and yard waste, pallets and construction waste — as well as passenger-car tires. An optional containment shield for the tub is available and, when installed, works with the standard hammer-mill deflector shield.