This HEPA Filter is compatible with the M18 FUEL™ 16mm Overhead SDS Plus Rotary Hammer with Integrated Dust Extractor and ONE-KEY™ (M18FHAFOH16). An installed HEPA Filter captures 99.97% of all particles greater than 0.3 microns for fine dust collection, ensuring dust and microparticle collection of debris such as concrete dust, sawdust, and drywall dust. Users can quickly swap or clean filters with the easy access quarter-turn design. Contains 3 HEPA Filters per pack.