Makita DX14 Dust Extractor Attachment with HEPA Filter Cleaning MechanismMakita DX14 The Dust Extractor Attachment with HEPA Filter Cleaning Mechanism (DX14) is for use with 40V max XGT Brushless 1 1 8" AVT Rotary Hammer, with Interchangeable Chuck (GRH02 sold separately). The Dust Extractor is OSHA Table 1 compliant for Exposure to Respirable Crystalline Silica and includes an efficient HEPA filtration system that captures 99. 97% of particulates . 3 microns and larger, it also includes a filter cleaning mechanism