Unfortunately, I kept breaking thread no matter how gently I tied. I ended up getting a couple of their ceramic bobbins which always work well for me.
H
Harrison D.
Bobbin
If it gets scratched at the tip on the inside it WILL cut and tear your thread
N
Nick L.
As advertised
They just work. The only issue I had was I had to bend them apart so that my thread would move more smoothly, but after that it's been perfect great. And for $3 I can't complain much at all