10.0 Amp AC/DC 11,000 rpm motor designed for faster material removal and higher overload protection. Dust Ejection System provides durability by ejecting damaging dust and debris particles that enter the tool through the air intake vents. Low profile, jam-pot gear case provides precise gear alignment for a smoother, quieter transmission while allowing access to tight spaces. One-piece brush arm prevents brush hang-up due to dust ingestion. Quick-Change Wheel Release allows tool free wheel removal without need for a wrench. Keyless adjustable guard provides tool-free guard adjustments, increasing productivity. Vibration-reducing side handle increases comfort for extended use applications. Auto-off brushes shut the tool down when the brushes need replacing to avoid tool damage. Oversized, protected spindle lock button provides easier and quicker wheel changes. Paddle switch with safety lock-off prevents accidental start up. Matching wheel flanges allow the use of common accessories.