Clean work is important: to protect health, to make a good impression with customers, and to keep everything running smoothly for precise working results. To achieve this, thorough final cleaning is not enough; you also need effective dust extraction as the power tool is being used. Especially when working with stone, masonry, mortar, concrete, screed, plaster etc., the dust released includes sand particles containing quartz (silicon dioxide) in respirable form. Such dust is classified as harmful to health. You should therefore always work with a tested and approved dust extractor or with a safety vacuum device.