The Milwaukee Hose and Accessory Adapter Kit allows Milwaukee hoses to connect to the most common vacuum accessory and hose sizes. The kit includes three pieces: 2-1/2 In. to 1-7/8 In. accessory adapter, 2-1/2 In. to 2-1/2 In.-1-7/8 In. hose adapter, and a 1-7/8 In. to 1-7/8 In. Hose Adapter. These step adapters connect different diameter Milwaukee Vacuum Hoses and Accessories. Each adapter is marked with the diameters it connects between directly on the tool for easy identification.