Quick-Flip™ speed change for compounding and polishing 2-speed selection button: low (600 RPM) and variable (600-2,000 RPM) Variable speed control dial enables user to match the speed to the application Electronic speed control maintains constant speed under load Soft start feature for smooth start-ups Refined design at 4.8 lbs. for reduced operator fatigue Motor-over-pad design for better balance and control Externally accessible brushes for greater serviceability Trigger lock-on button for added user preference Well balanced for maximum control and reduced operator fatigue