NB927-1 High Speed Double Needle Feed Off The Arm Chainstitch Sewing Machine 927 The machine is most suitable for seaming all kinds of materials shirts and nylonraincoat, used for tube overedging with lapper-holder. Independent looper make it easier for adjustment, needle guard move by feed dog to stitch light or heavy material. PLB Double puller : Right Angle large area cloth sewing and pulling material more smoothly