DEWALT D28499X 7-Inch/9-Inch 5.3-Horsepower Large Angle Grinder High power 5.3 hp (maximum motor hp) 6,000 rpm motor with overload protection provides higher operating speeds under load Epoxy coated field and armature provide long service life against abrasion from airborne debris Keyless adjustable guard provides tool-free guard adjustments, increasing productivity Rotating rear handle provides improved ergonomics in cutting and grinding applications Automatic turn-off brushes shut down the tool when brushes need to be changed to avoid tool damage 6,000 rpm provides optimal material removal with 9-inch grinding wheels