I have an older model combo belt sander, 6x48 with 12" disc, and the only info on it is "Arrow-Hart and Hegeman Electrical Co. I believe this is just for the start switch but not for sure. It is built on a heavy cast iron stand and is green in color. Anybody know anything about what I have. It is real heavy duty and works great. I'm new here and love the site so far. I will try to post a picture soon.