Three-dimensional work pieces from the medium-weight application range are the specialty of class 269. The free-arm construction ensures an easy handling; the bottom feed, needle feed and alternating foot top feed guarantee an absolutely reliable material feed. The machine is available as single needle and as twin needle version. There is various sewing equipment for welting, topstitching and assembling operations, e.g. on bags and suitcases. The twin needle version is mainly used in the manufacture of filters.