We have purchased it since its release. I use M12 and 120 mm in length and 150 mm in length, but I think that it is good for price.
I feel like I can not believe that the load carrying capacity is as high as the catalog in the touch feeling, but for now, there is no problem.
I do not really understand because it is the first type, but I think that the purpose has been reached. I also notice a little sticking to the magnet. I would like you to describe the material (eg SUS 304 etc.). I do not know because it does not compare with similar products, but I feel like there are too many fun.