The Glimakra Spolmaskin Swedish Bobbin Winder is used for winding bobbins for weaving or spinning.
Swedish Bobbin Winder comes in two sizes:
Thick (spindle diameter 1/4 to 5/16)
Thin (spindle diameter 5/32 to 3/16) - The thin style is more versatile because you can use it with bobbins or quills. Just place a cardboard quill over the spindle and then it will hold a standard weaving bobbin!