Push button start/stop for motor with disconnect used for a bench grinder. Can handle up to a 10HP motor at 480v, 7.5HP at 200-240v. Works fine but won't be using it as I will be wiring at a lower voltage and don't need such a robust and large control box. These things are surprisingly expensive when bought new, would be willing to negotiate if you have a smaller one for 208/240v. This one has a 120v switch on it as well to hook up grinding lights.