The 2x1 needle selector works on the Passap Pinkie, Duo80, and E6000 knitting machines (on the front and back bed). This needle selector will work on any 5mm gauge knitting machine. One edge of the needle selector has the 2x1 needle selector and the opposite side has a beveled edge which is great for pushing all the needles up or down. This needle selector is made from stronger materials than the original Passap needle selector. Brand new item.