To put it bluntly, they are very strong. I had a one year old who, with great child power, repeatedly PULLED and PULLED on my necklace which already had a heavy metal ornament on it. It never broke, none of the cables/devices broke. Love the color options and I even spliced two cords together to make a double lace chain, they are easy to work with. I mainly use them for stone and rock jewelry, but have also used them personally.
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