I was trying to find a decent dustless hand sander for drywall, since I do quite a bit of repair work for others and it can make quite a mess. This isn't it! The design is really poor. Ideally a tool like this should have a "perforated" plate with channels that allow the vacuum suction to do its thing with a drywall sanding screen. Instead, the plate is solid and Shop-Vac provides sandpaper sheets with the tool (and no screens), so the vacuum action is apparently supposed to work around the edges. Dust was still flying everywhere, since the sander wasn't effective. This "dustless" sander is getting returned for a refund.