The cordless random orbital polisher Mirka® AROP-B 312NV is light, nimble and ergonomic. Mirka® AROP-B 312NV has a brushless motor, a 77mm backing pad and a 12 mm orbit. It is important you understand before purchasing a polisher, sander or other tool the warranty is facilitated by the the manufacturer, which is in this case is MIRKA USA.