These little clamps are very disappointing. They look exactly like the ones that came with my Fitbit, but they don't last as long as the original clip. In no time at all - after just a few weeks of daily use - the metal part penetrated through the plastic silicone. I think the design is bad. You should have designed a clip that you press to open (like a clothespin) rather than having to pry the two opposing pieces of the clip apart with your fingers. Stretching wears away the silicone VERY quickly and then pierces the metal part. I will not buy these again. I hope to find a better holder/clip design that lasts longer.
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