Horsepower ratings for DuraTech's seven-model tub-grinder line ranges from 275 to 860. With a self-loader, the largest model, the 4012 industrial grinder, weighs in at 67,400 pounds and has a tub diameter of 12.5 feet at its top opening. On the other end of the spectrum is the model HD-9, which has an operating weight of 19,300 pounds. The HD-9, with a 275-hp John Deere engine, has an upper tub diameter of 9.5 feet. Newest in the DuraTech line is the 525-hp model 3010, available in either a track- or trailer-mounted configuration, and with and without a self-loader.