Singer Heavy Duty 4452 32-Stitch Mechanical Sewing Machine 50% More Power, 1100SPM, Top Bobbin, Threader, 1-Step Buttonhole, Stainless Steel Bed Plate

Top Drop-in Bobbin with Clear View Cover The Top Drop-in Bobbin makes bobbin threading fast and easy! The bobbins and bobbin cover are both transparent making it easy to monitor your thread supply. Just place the bobbin into the bobbin case, thread the guides then draw up the bobbin thread. Snap the cover in place and you’re ready to sew. The top drop-in bobbin is also jam-proof so your sewing is worry-free!