The needle of system 129X1 has a normal round point for working woven and knit fabrics. It is used in industrial lockstitch and general-purpose sewing machines, here mainly for technical applications such as luggage, bags and leather accessories and saddlery goods rather than classic garment production. Suitable machine classes are found, among others, at Singer (classes 12, 17, 22, 47), Chandler (classes 600, 600 - 75, 600 - 75-K, 600 - 95) and Juki (classes LT, LT - - OTHER CLASS).
Thinner needle sizes are used, among others, for light to medium-weight technical textiles and upholstery fabrics, and the thicker versions for heavy, multi-layer woven and knit fabrics as well as technical textiles. As sewing thread, a matching thickness is usually recommended depending on the needle size chosen, e.g. from Amann Serafil (polyester) or Rasant (polyester/cotton); for heavy-duty use, a bonded nylon thread.