Tiemco Magnetic Bobbin Magnetic Bobbin,, A masterful piece of engineering, this beautiful bobbin is absolutely amazingly with its smooth and elegant operation featuring controlling thread tension with magnetic force. A vertically adjustable ceramic tube, thread keeper and send standing design round out this ultimate bobbin. Comes in both standard and heavy duty.

The TMC Adjustable Magnetic Bobbin controls thread tension with magnetic force!

* Very low startup inertia minimizes thread cut
* Vertically adjustable ceramic thread tube
* Features a thread keeper
* Self standing design