The UltraEdge professional concrete grinder and polisher is aggressive gear driven and eliminates cords and generators. Reaches 3” under a 5¼” high shelf Grinds and Polishes within ¼” of walls Swiveling Multi-Positional Handle Powered by EPA/Carb Certified Kawasaki 603cc Engine Quick Change Plate System, Interchangeable with UltraGrind Optional Magnetic Attachment System Uses Custom or Standard Abrasives Steel Body Construction Removable Panel for Easy Cleaning Engine Warranty – 2 years Machine Warranty – 1 year.