JDW: Dynabrade Random Orbital Sanders
Here’s a review of the Video on the 
dustless system which makes sanding cleaner and helps to prolong the life of your sanding discs.
All of the sanders are pneumatic and require an air compressions system. We offer two five inch models and two six inch models.
In the five inch we have the 59024 Model and the 59020 Model which is virtually identical to the 59024, but is not dustless.
In the six inch we have the 59029 Model and the 59025 Model.
Again, the two models are virtually identical, but the 59029 is dustless and the 59025 Model is not dustless.
As with all sanders, begin sanding on the surface and end with the sander off the surface. You should also sand from left to right and then from top to bottom to insure that the entire work surface has been evenally sanded.
If you have questions regarding air pressure systems, then the following links from Dynabrade will be very helpful:
Recommended Air System
Selecting a Compressor
Maintaining Adequate Air Flow
In addition, we offer the following accessories for your pneumatic system:
Air Hose
Composite Dynaswivel Air Line Connector
Electric Portable Vacuum System
All these Products are available at 