7"/9", Variable Speed Polisher, Powerful, 12.0A, All Ball Bearing Construction For Long Life, Electronic Control Maintains Specified Speed Under Load Delivering Desired Finish Results, Conveniently Located Variable Speed Dial Lets User Set Maximum Speed From 0-600/3500 RPM For Different Materials & Applications, Variable Speed Trigger Allows User To Control Speed From 0 To Dialed Maximum Setting, Heat Treated, Precision Cut Steel Gears For Smooth Operation, External Brush Caps For Easy Servicing, Large Spindle Lock Button Allows For Easy & Quick Backing Plate Changes, Includes 2 Position Side Handle & Rubber Backing Pad.