Suitable With new needle bar swing device applied to ensure better Frictional power between needle bar and needle-bar set and prolong the life of use.

Sewing Back High-speed Over lock Sewing Machine. This machine have a free line loop device in the front needle board, it may make free line loop inside over lock seaming. Reduce bar tacking process and install the device of needle thread. It may loosen two needle thread in the same time when raise presser foot. It is suitable for underwear, T-shirts and so on.