Characteristics

　　Employ single straight needle， connecting rod and oscillating shuttle constituting double thread lock-like track．Up and down synchronized feeding with differential lifting tooth foot．Synchronous cloth-giving and both-presser-foot going up and down alternately mechanism to ensure smooth sewing without fold in any stitch．The sewing is neat and the track of the thread is artistic even with sticky and especially long materials．With a connecting rod，the rotating speed of the main axle is raised，noise is reduced，quality is guaranteed and working life is prolonged．

Uses
　　Product with extra-thick material such as packing bags，canvas and pack-strap.