HERZO universal dust shroud is specially developed for angle grinder 4"/4-1/2''/5". It designed aim to give the workers do their jobs under No-Dust environment.And it is easy installed,you just need take 1 minutes. Thanks to the 4 adapter rings supplied, the extraction hood is compatible with most angle grinders and can be converted from an angle grinder to a concrete grinder in minutes. Before you buy, please check whether the extraction hood also fits your tool. It also includes a high-quality diamond grinding cup 5". The widely ​​application includes grinding and milling of concrete, tiles, paint, natural stone, screed, masonry and much more (Warning: Not suitable for metal processing!) The option of connecting an vacuum cleaner provides effective protection against grinding dust, it can reduce dust up to 90%. This not only protects your health, but also saves valuable time when cleaning the workplace. Advantage Stay away from harmful dust Easy reach to wall edges Applications: Granite, marble, cured concrete, construction material. Installation steps Stept 1 Connect the grinder's head with shroud body. Stept 2 Lock the shroud to angle grinder Stept 3 Connect rubber hose with vaccum adapter Stept 4 Connect with vaccum cleaner The spanner This spanner can help you tight or release angle grinder accessories more easily. 5" diamond cup wheel Put the diamond cup wheel and screw tight Vaccum adapter This the rubber adapter used to connecting the Vaccum cleaner(Some cleaner may not use this modle adapter)