The 7\” Magnetic Rafter Square has a stronger frame and is the most versatile rafter square. The rafter layout square features scribe notches from 1\” – 6\” allowing you to easily and accurately rip lumber. A 1\” cutout in the rafter square helps prop pipe, making it easier to cut the pipe on the job site. A reinforced frame gives you more durability, while high visibility laser etched markings make the square easier to read.