... 3.low noise,high efficiency. Cam controled extra heavy duty long arm zigzag machine with large barrel shuttle ... and reverse.Standed supplied with puller for strong and steady feeding, 3 different cams, ... suitable for straight stitch, 2 step, 3 step,and ... items. A high foot lifter up to 20mm allows for heavy & bulky materials, such as sail, tent & marquees ...