I looked into this a year ago before the 3rd party product is available. It was about $80.
At $20, it is a lot more affordable.
The contraption is made of plastic. I would prefer it in steel. But at 1/4 of the real McCoy, it is all right.
The items snapped on the notches and it is a tight fit good.
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I have a walk way with weeds growing between the slates that I want to clean up. I don't want to deal with the mixed gasoline or the pull start of a wacker and this battery powered device should be what I need.
And yes indeed it is. It does the job.
It is not a powerful unit but again good enough to clean up all the weed growing. Now my walkway looks good and uncluttered.
The battery is good enough for a 20 to 30 minutes job only. But then, my arms are tired by holding the unit to do the job, which needed resting. So, I would charge the battery and do it again the next time. In hind sight, I should have bought one with two batteries. But then again, I can always purchase the spare battery plus the extras spools of string when I need it.