I think that the Mettlar and the Thread Art threads need a finer needle to use these without combining them with another thread. The Double Stitches are a bit looser than I like them to be, but they both tat up very nicely, so I will be able to combine these threads with some of my plain tatting threads for LOTS of possibilities now. The biggest surprise for me was how easy the Gutermann Metallic tatted up! My surprise comes from the fact that the thread is not smooth. I do have some Gutermann Metallic that IS smooth and that did NOT tat up very nicely at all! Completely opposite to my expectations!
Now, I'm off to see if they make a finer needle than the #8 Extra Fine that Handy Hands has. If not, then I am going to try tatting the Mettlar and the Thread Art thread using one of my Beading Needles. Will just have to watch my fingers as they are Sharps!