This powerful 40v Powerworks Cordless Line stimmer has a 30cm cutting diameter with automatic dual line feed, this also has a cutter for longer grass/tougher area (bushcutter) good for household gardens but also larger areas (commercial) It does not come with battery or charger however alternative batteries are available via amazon/Screw fix and other, 7 available and if want to purchase the 7 will sell all for £55
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