DeWalt 7" ANGLE GRINDERThe DWE4557 Angle Grinder is equipped with a powerful 4. 7 motor with overload protection and operates at 8,500 RPM to effectively grind and remove materials. It comes fully loaded with features including the Dust Ejection System that protects the grinder and extends the life of the motor brushes. High power 4. 7 HP motor with overload protection 8,500 RPM operation for effective grinding and material removal Dust Ejection System protects the grinder