Husqvarna Viking Specialty Bobbin Case for Groups 5,6,7Use Specialty Threads In the Bobbin for Fun Effects Create beautiful bobbin work, also called reversed decorative stitch embroidery with the Husqvarna Viking Specialty Bobbin Case. Wind heavier threads onto the bobbin which are too thick to fit through the needle and sew on the reverse side of the fabric. The Husqvarna Viking Specialty Bobbin Case lets you create beautiful textures and work with fun decorative threads. Includes instructions. You can