High power 4 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. Low profile gearcase allows for work in tight areas. Automatic turn-off brushes shut down the tool when brushes need to be changed to avoid tool damage. 5 position side handle provides improved ergonomics for specific applications. Two wire double insulated 'S' jacket rubber cord provides increased durability and life in hot and cold climates. 6,000 rpm provides optimal material removal with 9" grinding wheels. Lightweight design increases productivity in extended use applications.