Although the size is satisfactory, the strength is weak, on our side many cases are used for hard wood (zelkova etc.), and the hexagonal nut part is often damaged during tightening. Do you want stainless steel objects?
I bought it thought that it was made of iron, but I was disappointed because it was an aluminum alloy. (Attachment to Magnet) For Aluminum Alloy Crack Strength of Stopper Breaks Insufficient Strength, Also Because Fragment Falls and Foreign Mix Incorrectly, I'd like to handle iron as well.