The Singer Heavy Duty 4423 is a true workhorse. With a heavy duty metal interior frame, extra-high sewing speed and powerful motor, this machine can sew through a variety of fabrics from lightweight to heavier materials. It also features a useful automatic needle threader, top drop-in bobbin, fully automatic 1-step buttonhole and drop feed for free motion sewing which adds a new dimension of ease to heavy duty domestic sewing. The main difference between the 4423 and its previous model (Heavy Duty 4411) is that the 4423 has more stitches to offer and has a 1-step buttonhole feature.
