Dr. Slick developed ultra slick glass inserts to handle new synthetic threads as well as traditional extra fine threads (8/0 and finer). These funnel shaped inserts also allow for smoother application of thread as the bobbin is rotated and cause less breakage than traditional pipe or straight edged inserts.
I use this bobbin for wire when I'm tying flys. Works well.
M
Matthew
Very Nice
Love Dr. Slick so no surprises except the nicely contoured divot that your index finger rests in not shown in the photo.
Very comfortable in hand and better than the price tag suggests.
C
Chris B.
Great bobbin
I have been using this bobbin for some time. I have several of them. I like them better than the ceramic lined ones. I would recommend this for anyone.