Hogzilla tub grinders from CW Mill Equipment are available in three Series: TC, HC and WC. The four top-of-the-line TC models feature torque-converter drive, which, says the manufacturer, allows engine efficiency and added drive torque. These models have horsepower ratings from 750 to 1,650, with Caterpillar, Cummins or Detroit Diesel choices. The three HC models range in horsepower from 650 to 1,000 and feature "hydraulic-coupling" fluid drive. The three WC models, with horsepower ratings from 525 to 860, use the company's hydraulic power-take-off drive and, as do all Hogzilla models, offer a wide selection of hammers and tips.