The HTC 950 RX remote-controlled grinder uses four-head technology to balance the grinding process and make grinding easier. It grinds in a 36-inch-wide path from 450 to 1400 rpm. A backup battery makes it easy to drive the grinder onto or off of a trailer or without connecting the 100-foot power cord. An optional mist cooler system attachment cools the diamond tooling. HTC Inc. 877-482-8700.