Finally a tool that simplifies the construction of the Diamond Square unit without having to use paper foundation piecing. It is an all-in-one tool that gives you a window template for accurately cutting the center square, a chart printed right on the ruler for the recommended size to cut the triangles sewn to the four sides of the center square and a trim down section on the ruler that simplifies the alignment of ruler to fabric unit and allows everyone to clean up the unit to a precise measurement every time. This unit is a tricky one to get accurate, but with the Square² tool and technique of oversizing and trimming down you’ll have far better success than with any other product on the market. Item # DT09 Ruler size - 6 ½” x 12” Unit sizes - 6 size options from 1” finished units to 6” finished units Step by step illustrated instructions Instructions for left hand cutting and trimming Fine lines for high accuracy