The concept of wire keychains is great, but they have some problems. The price is great but some of them don't work. Both ends have a knurled stop and there is a grub screw end on one side. Then there is a female threaded part that slides over another stop and connects to the male end. The problem is that on some of them the plug that the female end is supposed to slide onto is irregularly shaped so you don't get a solid connection. When I tried to tighten it all the way the stop came loose from the wire meaning it was destroyed. Worked so well there was no point in returning the product, but I would look for another product on my next purchases.
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