Wrights-Sidewinder Portable Bobbin Winder. With the touch of a button, quickly and easily fill bobbins without having to un-thread and re-thread your sewing machine. The compact size means it fits anywhere, making it great for toting to class! The SideWinder comes with a UL-approved AC power cord/adapter (included) or runs on 2 AA batteries (not included). Accommodates all bobbins that have a standard round center hole. This 5-1/2x4x5 inch package contains one sidewinder portable. Comes in a variety of colors. Imported.