I have a old Craftsman belt sander before and it do not have a dust bag . it make a mess all over my workshop . I have read in several magazine about dust bag on belt sander and many of they do not do what they be suppose to do . I read the 15 review on the Amazon site and they all claim this Makita be the best . I be totally satisfy . it surely do a exceptional job at keep the saw dust in the bag .