I have a couple of PC 3 X 21's. One is variable speed, and the other isn't. If you watch CL, they pop up occasionally. A word of warning on belts. The little piece of Kelvar used to put them together has a limited life, so don't stock up too heavily. The few belts I need, I pick up from DJ's Tools at the fairgrounds flea market. He carries Klingspor's for about a buck each.