Features powerful pneumatically driven motors and a lightweight, rugged aluminum housing.Clean Sanding 3M™ Clean Sanding filter bag captures superior HEPA - rated dust and encloses dust for dust removal.It rotates in two oval patterns that overlap simultaneously producing a swirl - free, random sanding finish.Extended curved wrist rest reduces stress on the hand and wrist and provides increased leverage.Includes 3M™ grip material for a stronger hold and provides greater control with less effort.Composite cover to prevent cracks in the housings.