Dynabrade 69030 Non-Vacuum Dynorbital Silver Supreme Random Orbital Sander, 3-1/2-Inch 89mm Diameter Includes low profile, premium urethane weight-mated sanding pad Floating rotor utilizes five blades, producing more usable power, high-strength, composite rotor has better lubricating qualities Comfort Platform provides additional hand and wrist support, also offers increased protection against cold air exhaust