Trimmed corners promote accurate piecing, eliminate "dog ears" before sewing and reduce bulk at corners for easier quilting by hand or machine! Engineered corners are just one of the quality trademarks you will find on From Marti Michell products. When Marti travels to teach, she hears from quilters all the time that they especially love the Corner Trimmer because it is just the right size for joining binding strips (instructions included). Includes 8-page tips booklet with color cover.