Prym Bobbin Ring holds metal or plastic bobbins of all different sizes.
Bobbin Ring prevents bobbin threads from unwinding.
To adjust the width of the bobbin channel submerge the ring in boiling water for 15-20 seconds remove and press sides together.
Then dip in cold water.
Shaped like half of a bagel and hollowed out it is made of flexible rubbery plastic that expands to receive the bobbin and promptly closes up around it.
Threads won't tangle or unwind.Prym Bobbin Ring holds over 20 bobbins securely and is a simple elegant gadget to store any kind of bobbin.