The Makita DGA504 is equipped with a highly enhanced Brushless DC motor. A built-in controller changes the cutting speed automatically according to load condition, enabling users to obtain high speed rotation on light duty application/ high torque on heavy duty application. FEATURES: Constant speed under load - automatically changes the cutting speed according to load condition for an optimum performance High power motor Anti-restart function - prevents accidental start up for safety Soft start feature Battery fuel gauge LED's - also warns that anti-restart function and current limiter have been activated Rubberised soft grip Electronic current limiter for overload protection Slide switch conveniently located for one hand operation XPT - Extreme Protection Technology - for use in outdoor applications or harsh environments DGA504 SPECIFICATION: Voltage: 18v Bore Diameter: 22.23 mm Max Wheel Thickness: 6 mm Noise sound pressure: 79 dB(A) Noise K factor: 3 dB(A) Max Wheel Diameter: 125