This wallet size case is perfect to store your Knit Picks, Addi Clicks or any other interchangeable set. It might even be smaller than your wallet for those of you who feel the need to keep every receipt. You have a case already? Where are you storing those extra tips we know you bought? There is space in this case. The case folds in quarters and ties securely. A zip pocket on the side stores your connectors or tools. Have two sets of interchangeables? Check out our Double Interchangeable Case .