This is medallion is the second tat that I made, and it is the first time I attempted Chains.   I made it with a plastic Susan Bates Shuttle and second thread using light blue DMC Pearl Cotton in size 5.  The design is from "Easy Tatting" by R. Linden

It might sound funny to you, but I had a hard time with chains (or tatting with the ball thread/second shuttle). Until I found the book "Easy Tatting", I just could not make heads or tails of any tatting instructions I could find!