The BLACK+DECKER LST522 20V MAX Lithium 12 in. 2-Speed String Trimmer/Edger is part of the 20V MAX System; 1 System - Endless Tasks. Power for your Style. This tool is designed for trimming areas of overgrowth after mowing, as well as edging along borders, sidewalks, and flower beds. It features the Power Drive Transmission which increases torque for more cutting power at the string, and the 2-speed control lets you choose between more power or extended runtime. It easily converts from trimmer to wheeled edger, and the Automatic Feed Spool (AFS) automatically feeds trimmer line when needed with no bumping required. This unit is powered by a LBXR2520 battery which provides 66% more battery capacity for longer runtime. It has a premium micro texture soft grip that provides comfort and control while using the tool, with adjustable height and handle for ideal user comfort. Cutting swath of 12 inches; Line Size - 0.065 inches; RPM - 5,500/7,200; Replacement Spool - AF-100. Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18. Includes: (1) LST522 20V MAX Cordless Trimmer/Edger, (1) LBXR2520 20V MAX Extended Runtime Lithium Battery, (1) Charger, (1) AFS Spool, (1) Guard