Hook Left! Hook Right! Hook Down! Nope, not boxing, it's Snappi! Elimiate the need for diaper pins with the Snappi diaper fastener. We recommend the Snappi double pack as an excellent addition to your cloth diaper stash. While you really could get away with only one Snappi (and check out our Snappi Size 1 Single if you want to go that route), chances are you will lose the Snappi, your dog will run off with it, and on occasion they will break. So have two on hand and you will ge good to go!