The bottom bobbin case is positioned horizontally within a stitch plate and has a mostly transparent plastic cover for checking the amount of thread on the bobbin. The advantage of the horizontal bobbin is mainly quiet operation, the possibility of sewing at higher speeds and greater variability of stitches.
An automatic needle threader is a sewing machine appliance that helps to thread a thread into a needle. As a result, the process is sped up, so you can start to sew within moments.