... 2.zigzag width:12mm 3.low noise,high efficiency. Cam controled extra heavy duty long arm zigzag machine with large barrel shuttle ... puller for strong and steady feeding, 3 different cams, suitable for straight stitch, 2 step, 3 step,and 4 step zigzag, pneumatic ... of Durkopp Adler 366-76-12-HM. Heavy Duty Heavy Thread Zigzag Sewing Machine