The GO! Storm at Sea die is a Block on Board? (BOB?) die that is specially designed to include all the shapes on one die board to create a 3-color, 9" finished repeating block with single sashing. The Storm at Sea die includes the highly requested 60? Diamond in a Rectangle for the sashing, specialized dog-ears and 1/4" seam allowances for easy alignment and piecing. Imagine how long it would take to cut all of these pieces by hand! The GO! Storm at Sea makes it so easy.