The 6180-20 is the world's only tool-free abrasive cut-off machine. There are no tools required for adjusting the back fence or changing abrasive wheels. The base is heavy-duty cast aluminum with a 1/4 in. reinforcing plate that provides additional support. The vise and back fence are 3/8 in. thick cast iron. A horizontal D-handle provides optimum comfort whether the tool is on the ground or on a bench.