It needs to be heavy duty enough that it will push into our clay soil to get Canada thistle roots out further below ground, so that by the time they regrow, the grass is tall enough to discourage the thistle. I bought something like this, (essentially a long-handled dandelion puller, although I have *no* idea why people would want to pull dandelions by the roots when they make such good chicken greens) but it's so darn wimpy that it bent the first time I tried to use it.
The first one is a long-handled device meant to be jammed into the soil , to cut tap roots beneath the surface.
I am going to test your electrical conductivity with this tiny ad:
Permaculture Playing Cards by Paul Wheaton and Alexander Ojedahttps://permies.com/wiki/57503/Permaculture-Playing-Cards-Paul-Wheaton