Standard Pack = 1 piece(s). Features = Overload protection , Dust Ejection System increased brush life and protects the motor , Anti vibe trigger handle reduces user fatigue , automatic turnoff brushes , S style code ; Motor = 4.7 HP ; No Load Amps = 15.0 ; RPM = 6,500 ; Spindle Size = 5/8 - 11 IN ; Wheel Size = 9 IN ;