Apparently there are only three companies in the whole world that make interchangeable needles. Boye, Denise and Knitpicks. Now I know that can't be true!
I own the Denise set, which i love except every now and then, at the worst possible time, the needles twist off the cord. Other than that they are great. The Boye and Knitpicks sound really great, but they seem to only have long cords of 24" and up.
I'm on the hunt for other companies that make them.
4 days ago