Knitting yarn bobbins
They are of a good size and can hold more yarn than other bobbins I have which is excellent. The downside is that with the yarn that I am using it is not easy to stop unraveling when changing to knit with the next colour. When you have perhaps up to 6 colours in a row, there is a strong possibility that the colours get tangled. Using heavier yarns I don't think there would be this problem