Fox Products offers a quick hitch and coupler system for articulated heavy equipment, and has a patent pending on the design. They mount the coupler on Caterpillar's 446 tractor, which can then pull a 7-cubic-yard elevating scraper. The scraper has a turning radius of less than 20 feet. The 110-hp tractor can also tow a 3,000-gallon water wagon and a 15-ton dump trailer. The 673–4 is distributed through the Cat dealer network. Estimated price (tractor and scraper): $180,000.