Black & Decker NST1018 GrassHog 18v Cordless 12 in. Trimmer & Edger 18-volt, 12-inch cordless string trimmer/edger Telescoping shaft, centrifugal forces automatically advances line Patented gear drive transmission amplifies motor torque for increased cutting power and performance Includes trimmer, 1 battery, and charger; weighs 6.8 pounds 2-year warranty