We bought this basic contraption from Seymour expo years ago, it’s only the bottom ‘boss’ thing for the chunky brushcutter line.
Works an absolute treat once we adapted it under a blade for use in tandem.
If the going gets too tough the cord seems to lay back and then let the steel do the hard yakka.
Also makes for a great height guide for the steel blade above and over rockier areas just simply resting the whole head weight on the spinning boss.
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