Blackdecker corded strimmers blackdecker st4525 gb the st4525 corded strimmer from blackdecker has a high torque gear system and 450w motor which powers through overgrown areas quickly without clogging with a 30cm cutting swathe the st5530 can clear large areas in a short time the automatic single line feed system saves you time and effort while trim 8216n edgereg allows you to convert from trimming to edging mode simply by unlocking and twisting the pole two handles provide comf