High quality stainless steel bobbins from Stonfo Italy, these bobbins feature a slider that allows for tension adjustment on the fly. Both models are great for spools of all sizes with tubes made from strong hardened steel to prevent fraying of the threads.
Art no. 674 Bobtec 1 has a smaller tube diameter as compared to Art no. 675 Bobtec 2. Bobtec 1 is great as an all purpose bobbin whereas Bobtec 2 is more suitable for thicker threads.