At first I liked this bobbin so much that I bought two more. After a month of my second purchase, I started having problems with 2 of the three. On one the ceramic tube began to slide in its guide, so I had to use head cement to hold it and it has been fine for over a year now. On the other one the arm is free from the spool and rotates constantly, try gluing it and it broke again. Should of returned them, but since they were mail order I didn't bother.

I really like the feel of these bobbins, just didn't get the use durability of them.