Needlemaster 40-Piece Interchangeable Aluminum Knitting Set Boye needlemaster interchangeable knitting set 8 Sets of aluminum single-point knitting needles, with cable lengths 20-inch, 24-inch, 29-inch and 36-inch, and travel case Includes 4 stitch holders (button) and 2 cable couplers Make regular circular knitting needles, straight flexible needles, even elongate the cables with couplers. This set provides infinite possibilities for any project you fancy. Founded in 1906, Boye Needle Company was the first American manufacturer of crochet hooks and knitting needles.