Metal Dog Tags Clanking on Chain Necklace?

I was wondering if there is a way to protect my dog tags and stop them from clanking eachother.
They are 2 metal dog tags that i have on one ball chain necklace.
when i walk the whole chain sways so it causes the dog tags to bang into eachother, causing tiny dents and scratches.
Is there any way I can stop that?
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