Dynabrade 21035 6-Inch (152 mm) Diameter Non-Vacuum Dynorbital-Spirit Random Orbital Sander, 12000 RPM, 3/16-Inch 5 mm Diameter Orbit Optional vacuum conversion kits are available to easily convert non-vacuum tool to self-generated vacuum tool or central vacuum tool Floating rotor utilizes five blades, producing more usable power. Less air is used more efficiently to maintain maximum power Comfort Platform provides additional hand and wrist support. Also offers increased protection against cold air exhaust Throttle lever recesses into housing grip when depressed, eliminating pressure-point on operators palm Speed Control allows thumb-control regulating of tool speed. Lighter air-motor assembly, ideal for vertical and overhead sanding applications