Hilti's VC 75-1-A22 5.2 Lithium-Ion, 3.5 Gallon tank cordless vacuum is leading the industry with .75 (Cubic Feet per Minute) CFM suction power in full power mode and twice the run time in Eco mode. This vacuum includes a HEPA and Dry filter. It is also the industry's first cordless vacuum to meet new stringent government regulations regarding silica dust in the United States. The VC 75-1-A22, with its filter cleaning mechanism, provides an OSHA 1926.1153 Table 1 compliant solution for drilling holes in concrete or masonry. This cordless vacuum can be used without a bag as long as its nothing hazardous such as silica dust. A filter must always be used and nothing wet can be suctioned.