This is a DB21035 6" DA Sander. Dual action orbital sander has a 6" diameter pad, non-vacuum style. This hand sander has a 3/16" orbit, which is perfect for general sanding jobs. Available in both non-vacummn & central vacuum styles, Depending on your shops's setup. Features speed control that allows for thumb-control regulating. Also features perfectly balanced construction, which helps to reduce vibration & creates a swirl-free finish, while the built-in muffling system reduces sound level.