This set of Flat Machine Knitting Needle and Jack may be used with any flat knitting machines. This set of Flat Machine Knitting Jacks and Needles is constructed of steel, so it will last for a very long period. It enables the joining of the loops and provides for their construction. As an extension of the needles, this Flat Machine Knitting Needle and Jack operates on the channels of the needle beds. This jack serves the function of assisting the free yarns in making loops.