The Dust shroud offers best-in-class dust collection improves safety for user and the entire jobsite. Reduces clean up time and provides safer air for user.Offers easy toolless installation to maintain productivity, but without reducing safety.Single screw quickly adjusts and maintains desired depth of cut. Vacuum compatible without the need for adapters.Use a universal hose adapter, Dust extractor is compatible with standard hose size 1-1/8 inch;1-1/4 inch;1-1/2 inch.Box Contains the following: 1x Dust Shroud，6 PCS clamping washer thickness 1.5-5.5mm,1x clamping flange, 1x shroud wrench,1x Universal Vacuum Cleaner Hose Adapter,1xDiamond saw blade.