DEWALT D28402W 4 1/2-Inch 10 AMP Small Angle Grinder with Wheel 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 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