Model 4680 Beast Recycler is now available as a self-propelled unit with a Caterpillar 325 track undercarriage. The operator can move the machine around the yard, which eliminates the need for a towing vehicle. Also, a radio remote control allows it to be operated from a distant location. Its mill is 57 inches in diameter, 63 inches wide, and has a 40-inch-high by 60-inch-long opening. It is powered by an 860-hp diesel engine.