6" (152 mm) Dia. Non-Vacuum Dynorbital-Spirit Random Orbital Sander .25 hp 12000 RPM 3/16" (5 mm) Dia. Orbit Rear Exhaust Comfort Platform provides additional hand and wrist support, further enhancing operator comfort. Also offers increased protection against cold air exhaust. Throttle lever recesses into housing grip when depressed, eliminating pressure-point on operator's palm. Dynorbital-Spirit lever is made from composite material to insulate against cold air. Lever is color-coded to designate tool orbit. Easy maintenance and vacuum conversion. Muffler elements are easily changed for convenient maintenance. Low Sound Levels. Muffling system reduces exhaust sound levels. Speed Control allows thumb-control regulating of tool speed. Lighter air-motor assembly, ideal for vertical and overhead sanding applications. Precision one-piece motor shaft and counterbalance. High-quality Double Row Pad Bearing, protected by unique V-Seal, improves bearing life and ensures reduced vibration. Perfectly-balanced, weight-mated sanding pad with one-piece hub design. Dynabrade premium urethane pads offer smoother operating performance and minimal vibration.