WD-737BK Three Thread Overlock Back Latching 

Suitable for overlocking and overedging workpieces of light and medium weight materials.
Auto lubrication and excellent performance.
Low sewing tension,neat & beautiful stitches!
Suitable for overlocking and overedging workpieces of light and medium weight materials.
With low sewing tension, neat and beautiful stitches are achieved even running at high speed.
Low sewing tension, neat & beautiful stitches.