The DBXK5 SD1 needle (needle system DBXK5) has a round point with small triangular cutting edge for working leather, synthetic leather and other coated materials – never for woven fabric, since the cutting action would sever the weave threads. It is used in industrial sewing machines for leather and synthetic-leather work, where the cutting point produces a clean puncture. Suitable machine classes are found, among others, at Brother (classes BAS, BAS -401, BAS -410, BAS -411), Tajima (classes MLHII, TEHX, TEJT, TFGN) and ZSK (classes 169, 172 to 175, 201 to 224, J).
The available needle sizes are used, among others, for thinner to medium-weight leather. As sewing thread, a bonded polyester or nylon thread such as Amann Serabond, Amann Strongbond or Coats Dabond is usually recommended, in a thickness matching the needle size chosen. A cutting point is required here to create clean puncture channels in firm materials.