Worx WG951.4 20V Lithium-Ion 2-Piece Outdoor Tool Combo Kit 12 in. 20V Lithium-ion Cordless Grass Trimmer Edger - WG160. Telescopic shaft adjusts to user's height and posture 100% automatic twin line feed for best cutting performance Tilting head pivots 90 degrees for hard-to-reach areas, or for cutting at desired angles Quick change spool system