The Four Patch is a classic unit that is fun to make and ends up perfectly square with Studio 180 Design's Four Patch Square Up tool. A Toolbox Blitz offers 9 quilt designs in sizes from baby up to king.? You select the design, the size and the size units you would like to make.? It's like a pattern on steroids.? Keep this with your binder of? Design Sheets and Technique Sheets and you will have a library of patterns at your finger tips.?? Requires the use of the Studio 180 Design Four Patch Square Up tool.