Closed circuit, dust free when connected to an appropriate Blastrac dust collector. Heavy duty hand grinders, ideal for professionals. To be used with standard cup wheel 180 mm. Flexible anti vibration handle, thus very comfortable for professional to use all day long. Double insulated aluminium motor housing. Dual air inlet on top and on bottom for improved motor cooling and dust extraction. Grinding head is protected by a plastic shroud with several side holes, for an optimized air / dust flow. Several optional grinding discs.