Dynabrade 59013 Self-Generated Vacuum Dynorbital-Spirit Random Orbital Sander, 6-Inch 152mm Diameter Includes low profile, premium urethane weight-mated sanding pad, blue lever identifies 3/8" (10 mm) dia. orbit, used for aggressive sanding Drop-In Motor available (sold separately) to reduce costly down-time associated with routine maintenance Comfort Platform provides additional hand and wrist support, also offers increased protection against cold air exhaust