Garland Gray II wrote:

Ha, I was a little slow to get that one!
I always used ss until I saw what it does to galvanized chain.
I had never seen a black plastic one until a few hours ago! A friend had
bought an anchor line on ebay, and I noticed it in his truck. Only id was
Taiwan, but was a nice thimble w/ straps.

For that reason, I use galvanized thimbles on anchor rode.