The Dust Shroud is designed for use with diamond cup wheels for floor grinding applications. The max. collar size is 1-13/16" which fits most 4" to 5" hand grinders including Makita, Bosch, Dewalt and more. But it does not fit all grinders. Please check your collar size before buying. We also have an Aluminum 5" Dust Shroud, it's collar size is 2". Please check and see if the Aluminum one would be a better fit.
Outside diameter of hose connector is 1-1/4". If it does not fit your shop vac, you can duct-tape them together.
You may purchase separately our Diamond Turbo Grinding Cup Wheel for concrete floor applications. Utilizing the lastest "Multilayer Vacuum Brazed Technology" the cup wheels are super aggressive and long lasting and thus become the top quality in the markets.