The BN Products Electric Drywall Sander is designed for sanding walls and ceilings made of drywall or plaster in any position. This tool features an innovative HALO Lighting System that helps you can see all the variations on the surface you are sanding. Just use the built-in extensions to change the length of the tool from 3.6ft. to 5.4ft. long. With the extensions, you can easily reach up to 12ft. The long-reach is ideal for sanding high walls and ceilings. The removable brush segment allows sanding right up to the edge with ease. The tool also provides an easy hook-up with a standard vacuum hose to ensure a dust free working environment (when coupled with a properly used HEPA vacuum). The tool can be folded in half to reduce the length of the tool. This tool is ETL certified.