Global BS 377 Button Sewer Global Single Thread Chainstitch Button / Tacker Sewing Machines The product specifications for the BS 473/377: Single thread chain stitch button sewing machine & tacker. For sewing on flat 2 and 4 buttonholes. Optional clamps: Shank-stay-wrapped buttons and snap fasteners available, plus tacker clamp. This machine is equipped with a quick stitch-shape changing mechanism and with a knot-tying mechanism to prevent the unravelling of stitches.
