DEWALT DWE4559N 9-Inch 6,500 Rpm 4.7 HP Angle Grinder High Power 4.7 HP (maximum motor HP) 6,500 rpm motor Dust Ejection System increases brush life and protects the motor from damaging particles entering the air intake Anti-Vibe Trigger Handle reduces user fatigue caused by vibration Quick Change Guard allows user to quickly adjust guard to redirect sparks 3 position side handle provides improved ergonomics for specific applications