The top loading bobbin case holds the threaded bobbin safely in the lower part of the sewing machine. It also provides tension to the lower thread. As the needle thread is pulled around the bobbin case, it wraps around bobbin thread and pulls it up through the needle plate.
For use with Baby Lock: BLAR, BLCR, BLDY, BLDY2, BLJY, BLSA, BLSOG, and BLTA2.
For use with Brother: NV1E, NV6750D, V5, VM5100, VQ2, VQ2400, VQ3000, XP1, XV, XV8500D, XV8550D, and others.