The standard Class 15 bobbin works with an automatic needle threader to get jobs started quickly. A drop feed system is also used when free motion sewing is needed, and the free arm also allows for thicker materials to be worked on. The construction of the unit uses a heavy duty metal frame which avoids skipped stitches. A number of accessories come with the machine, including a seam ripper, needles, 3 bobbins, and a foot pedal.