These magnetic clasp’s are very sturdy and strong, and an excellent value for the money. Sturdy enough for natural stone necklaces. The magnets are not quite as strong as i'd like, but overall they are fairly secure.
Hardware is great, the pliers are okay (i don't really use them, i have a table rivet press i use). The only complaint i have is that each key fob is individually wrapped in it's own small plastic zip bag.
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