I find it funny that people gave this bad reviews because they got saw dust thrown in their face. It comes with a bag to use. I didn't like the bag so I decided to attach my shop vac to it and to my disappointment, it doesn't fit. I tried several different adapters and finally headed to Lowe's plumbing section and bought a 1" compression fitting that fits on the sander and my shop vac. It's perfect and no saw dust. See attached picture.