The black and decker st5530 corded strimmer is powered by e drive the high torque gear system and 450 watt motor powers through tough overgrown areas quickly without clogging fast cutting action provides a 30cm cutting swathe for fast job completion over large areas uses afs or automatic single line feed system that saves you time and effort trim n edge allows you to easily convert from trimming to edging mode by unlocking and twisting the pole the edging guide wire allows for neater lawn ed