Professional 6” Dual Action Random Orbital Sander (Air Driven). The random orbit sanding pattern ensures that no single part of the abrasive material travels the same path twice. Because of this random sanding action, the tool does not leave swirl marks producing a virtually scratch free finish, and is not sensitive to the direction of the wood grain. Clarke XPro air tools are a superb new range of top quality professional tools built for tough daily use in garages.