What it's Used For:

• Adjust your bobbin case as needed for different weight threads. Always work in small adjustments at a time.
• We encourage a separate bobbin case to be purchased when using thicker, and industrial style threads. This is a large adjustment to the bobbin tension and can break your bobbin case if done often. 
• The latch allows this vertical bobbin case to be easily removed from the machine. We recommend avoiding using it to insert the bobbin. You should always here an audible click to ensure the bobbin has been inserted properly. 
• Needing a T screw? Click here.
• This will not work on any computerized machines, or TL machines.
• Scroll down for compatible models and video tutorials.