The Festool D 27-BSD Drilling Dust Nozzle is designed for use when drilling holes of up to 12mm diameter in walls or ceilings. Once connected to a vacuum cleaner or dust extractor the dust can be sucked straight out of the work area while drilling is taking place. Suitable for the Following Festool machines:BHC 18PDC 18PD 20CT SeriesCTL SeriesCTM Series Features and BenefitsAdaptor with flexible insertDrill sleeve made from nickel-plated steelCompatible with all standard industrial and domestic vacuum cleanersException: must be deactivated on extractors with automatic filter cleaning systemDesigned for drilling in floors, walls and ceilingsSuitable for drill bits up to 12 mm diameterExtracts dust and residues straight out of the work areaPatented dual-chamber system for clean drilling and a secure holdFoam rubber pad for a secure hold on uneven surfacesFlexible joint piece for moving hose to perfect position