Toro 51488 48-Volt Max Cordless Dual Line Trimmer, 13-Inch 48-Volt Max Lithium Ion Battery provides up to twice the power per weight versus traditional nickel-cadmium batteries 13 in. dual line for superior performance Cast aluminum trimmer head for durability Auto-feed trim line automatically adjusts the line to the perfect cutting length Variable speed control for multiple applications and longer run time at lower setting