THTEN 2900719 Trimmer Blades Head Replacement Spool 20ft 0.065 inch Compatible with Greenworks 2101602 2101602A STBA40B210 2101602 ST40B410 BST4000 Dual line String Trimmer,20 Pack 88512 6Pack 【Pre-Wound Spools】The spools are pre-wound

【Pre-Wound Spools】The spools are pre-wound for easy installation

【More Efficient】Compared with the traditional round replacement wire

PRE-DRILLED HOLES: Comes with round corners and pre-drilled holes for easy mounting

【Blade Trimmer Head Compatible Models】ACFHRL2 Polycarbonate Bladed Trimmer Head

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THTEN 2900719 Trimmer Blades Head Replacement Spool 20ft 0.065 inch Compatible with Greenworks 2101602 2101602A STBA40B210 2101602 ST40B410 BST4000 Dual line String Trimmer,20 Pack 88512 6Pack 【Pre-Wound Spools】The spools are pre-woundCompatible with Greenworks models: 2101602, 2101602A, STBA40B210, 2101602, ST40B410, BST4000 dual line string trimmers. Easy Installation: simply push this trimmer head into the string socket and it automatically locks in place with assistance from the side push buttons. For Best Use: avoid using this accessory for edging, working alongside brick, chain, or wooden fencing. Products Include: The package contains 6 Pack Polycarbonate Blades and 4 Set