High power 4.7 HP (maximum motor HP) 8, 500 rpm motor provides overload protection provides higher operating speeds under loadDust Ejection System(TM) protects the motor from damaging particles entering air intake that would otherwise abrade the motor and increases brush lifeAnti-Vibe Trigger Handle reduces user fatigue caused by vibrationLight weight design (11.6 lbs) lessens user fatigueAutomatic turn-off brushes shut down the tool when brushes need to be changed to avoid tool damageLow profile gearcase allows for work in tight areas8, 500 rpm provides optimal material removal with 7" grinding wheelsBrush door allows for quick brush replacement\Quick Change Guard allows user to quickly adjust guard to redirect sparksSoft grip trigger handle provides greater comfort and controlThick, "S" style cord takes the abuse of the jobsite and shop environments providing durability and long life for the cord set3 position side handle provides improved ergonomics for specific applications | DEWALT 7" Angle Grinder DWE4557