The Blastrac BMG-435-115 planetary grinder has a 115-volt, 15-amp motor that can be used indoors with a household electrical circuit. This three-headed planetary machine is designed for multipurpose use on concrete, terrazzo, natural stone and wood surfaces. On concrete, the grinder cleans and prepares the surface, levels uneven areas, removes coatings, and cleans glues, mastics and polishes. The BMG-435-115 cleans dirt, grease and scuff marks from terrazzo or natural stone and is also used for grinding and polishing. For wood, the unit cleans paint and coatings and sands the surface for refinishing.