Dust Ejection System provides durability by ejecting damaging dust and debris particles that enter the metal grinder. Large spiral bevel gear provides long transmission life. One-Touch Guard allows for 360-degree rotation of the guard with a single action. The ball-bearing construction provides vibration-free performance with a muffler exhaust that allows quiet operation at home or in the garage. Ideal for restoring dull car paint, removing rust, or fine scratches to reveal a beautiful gloss finish on your vehicle’s exterior.