A sprag clutch is a one-way freewheel clutch. The stator was equipped with a sprag clutch enabling it to freewheel when required. On conveyor drives, a sprag clutch is used for indexing and anti-runback. It uses no bands nor sprag clutches. A link is installed between the prime mover and one race of the sprag clutch. When the machine tries to run backward, the sprag clutch prevents this motion. In this application the sprag clutch is often called a "backstop" or "holdback". Most sprag clutch manufacturers don't allow the use of lubricants containing extreme pressure additives. A single sprag between the spokes of a wheel was holding them. Sprag clutches may be oil or grease lubricated. Two businesses remain open, the Sprag Pole Restaurant and Museum and the Bedroom Goldmine Bar. The Sprag Pole occupies one of the town's original buildings, built in 1884.