If you have access to compressed air, and your compressor generates at least 8 CFM @ 40 psi, then this 6" Pneumatic Orbital Machine may be more convenient for you than our electric Orbital. It's lighter and more maneuverable. The palm activated switch is convenient (no fumbling for the switch). To turn off, just lift your palm off slightly. The Orbital's speed is adjustable with the quarter-turn valve. You'll like the feel, the ergonomics and speed of this unit. Has a 1/4" NPT thread to install your own quick disconnect coupling or hose. If you have air, you'll love this tool.