M18 Fuel String Trimmer, Power To Clear Thick Brush, Reaches Full Throttle In Under 1 Second & Provides Up To 1 Hour Of Run Time Per Charge, Designed To Meet Landscape Maintenance Professional Needs, Motor Is Positioned In Rear Of Trimmer To Provide Best Combination Of Power, Balance & Maneuverability, Trimmer Features High & Low Speed Settings With A Variable Speed Trigger, High Provides Power To Clear Thick Brush, & Low Maximizes Run Time While Having Plenty Of Power For Grass Trimming, 16" Cutting Swath Trims More Grass In A Single Pass, Increasing Productivity, Full Sized Head Holds More Line & Has A Metal Reinforced Bump Knob For Longer Life, Fully Compatible With 125 + Solutions On M18 System.