The needle of system UY 101 GS has a normal round point for working woven and knit fabrics. It is used in industrial chainstitch and general-purpose sewing machines. Suitable machine classes are found, among others, at Union Special (classes 2600, 9500 G, 9900, 14700 D), Mauser (classes BIH, DDE, F, F -SP 23200- -2,5) and Pfaff (classes 2028, 2053, 2028 - 1-4-19, 2053 - 1-2).
Thinner needle sizes are used, among others, for light, fine woven and knit fabrics such as blouse and shirt 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).