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 operator"s palm * Speed Control allows thumb-control regulating of tool speed. Lighter air-motor assembly, ideal for vertical and overhead sanding applications