1. This machine make it incredibly fast and easy to finish closed or open tube forms, such as railings, etc.

2. With different belts, you can rough sand and fine sand to remove surface imperfections, blend, create surface effects like stain or brush finished. All the way to mirror polishing.

3. The arms allow the belt to wrap around the surface to sontact 180 degrees of the tube at a time.

4. There's no easier or faster way to deal with tube constructions.