Connect your ds577 DEWALT® 7-1/4 in. Worm drive style saw to a dust collection system or vacuum with this dust port connector. This attachment is compatible with the DEWALT® dust collection system adapters dwv9150 and dwv9100. This adapter is designed to accept common 1-1/2 in. Diameter hoses. This kit includes a dust port attachment, fastening screws, and assembly instructions.