Made a mistake and bought some Rite Bobbins a few years ago so Im replacing them with something I know works. I usually use a ceramic bobbin, but decided to try some of these glass bobbins from Dr. Slick. I like how this bobbin feels in my hand. Its relatively easy to thread them (I do not like the idea of using a bobbin threader because I dont want to possibly scratch the inside of the tube leading to thread breakage). As I said, I usually use ceramic bobbins, and with these glass bobbins, I'll say that I have experienced fewer thread breakages but it hasn't eliminated it totally (I doubt any bobbin could)
