Dewalt DWE4557 7" 8 500 Rpm 4.7 Hp Angle GrinderDewalt DWE4557 Complete a wide variety of grinding applications with the 7 in. 4. 7 HP Angle Grinder. Designed to deliver high performance in tough jobs, this grinder provides up to 8,500 rpm for optimal material removal on tough jobs. Features High power 4. 7 HP (maximum motor HP) 8,500 rpm motor provides overload protection provides higher operating speeds under load Dust Ejection System protects the motor from damaging particles entering air intake