The DEWALT DCS577DC dust Collection adapter is a attachment that allows you to connect your DCS577 DEWALT 7-1/4" Worm Drive style saw to a dust Collection system or vacuum. This attachment is compatible with DEWALT dust Collection system adapters DWV9150 and DWV9100. This adapter is designed to accept common 1-1/2" Diameter hoses, which allows for system flexibility. Includes: dust port attachment, fastening screws, assembly instruction sheet.