MARTI MITCHELL-A 4" square basic set of templates for quilts. Perfect shapes and sizes-laser cut accuracy-specific size pieces. No guessing which line to use on a ruler. 1/4" seam allowances are already added. Perfect corners-not just blunt, but revolutionary double blunt corners engineered for perfect alignment. Perfect for rotary cutters-cut multiple layers at one time. Great for hand or machine piecers. Contains 7 shapes with seam allowances- 4" square, right triangle with 4" hypotenuse, right triangle with 4" leg, square that measures 4" diagonally, right triangle with 2" hypotenuse, 1/4 of 4" square, and right triangle with 2" legs. Also includes 6 free patchwork designs for 12" blocks. WARNING: This product contains chemcals including Poly(methyl methacrylate), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.