Easily mark diagonal stitch lines, sew, and cut, and you get a bonus HST unit from your leftover corner cut-offs. No wasted fabric! The Bonus Buddy doubles as a seam-guide marking tool for your machine and is also a handy 1" x 5" ruler. Designed by Bonnie K. Hunter, this will be your new favorite piecing tool. * Small (1" x 5"), multi-use, essential tool to keep by your side * Only ruler template on the market with seam guide holes for your sewing machine * No more wasted triangle scraps! More half-square triangle units with each cut.