With this new square in a square tool, you are now ready to experience the amazing Square In A Square Technique. You will be sewing strips to squares using the Square In A Square ruler to cut the basic unit. Sewing straight strips to squares and then cutting them into triangle units makes your blocks extremely accurate. Don't let the name mini on the package confuse you. This is the original ruler in a new size. This new square in a square technique ruler features a 36 page book with Instructions for four options, seven patterns, four blocks, a new ruler shape, a new look to cut down on glare and skid, plus the new ruler feature for option 39 in the trumpet book. Many students prefer this smaller, easier to use size.