This is a very interesting square if you want to learn about ribbing, it has back loops to the max, you have combinations. It is a 2 x 2 ribbing taking you through the steps of back loops and front loops, knitting and purling. What does this do for your knitting? You get the opportunity to learn about back loop kniting and purling and how that changes the way the stitch looks and behaves. Thanks for stopping by!