10 Principles of Psychology You Can Use to Improve Your yarn spooler
http://www.colegiosentli.edu.mx/portal/index.php/forum/user/313220-j8outhm607
This ball winder is great. It is well made and the gears under the part where the yarn goes are concealed so you don't have to worry about yarn getting caught in them. Thats why i chose this model over the one