The DEWALT D279053 adaptor allows the DEWALT D27904 & D27905 10 & 12 Gallon Dust Extractor Vacuums to be used on tools with a 2-1/4 in. Dust Port. The DEWALT Dust Extraction System helps improve air quality on the jobsite or in the shop while allowing users to get the job finished faster. They feature the VCSTM (Vacuum Control System), which combines an automatic filter clean component (D27904 only), power tool actuation, variable speed control and a twist-lock hose for increased ease of use and productivity. DEWALT D279053 Includes Adaptor Only, DEWALT Dust Extractor Vacuums Sold Separately.More Information