Features and Benefits: * A more aggressive version of the Model 4500 for those who want to do a superior job faster * A newly designed Air-Efficient motor with Positive-Action Drive backed by 4-support bearings powers a unique oversize drive head for full contact sanding. Best for detailing, feathering, and leveling * Does great finishing, too! * New positive air-control valve * 6" Pad Standard * 5" & 8" Pads Available * Handle sold separately