Customer Feedback Has Led Addi to Develop this Little Helper.  When Clicked To An Addi Cord, It Prevents The Knitted Piece From Sliding Down The Circular Knitting Needle.  You No Longer Have To Bother Pushing It Back Up - Just Keep On Knitting.  The Set Includes 2 Pieces In Each Of The 3 Sizes, Which Fit With The Original Addi Cords.  Made In Germany.