The SAVAGE™ Combination Square is great for laying out lines for ripping, crosscutting, mitering, and making notches. The head, with fences at 90 and 45 degrees, slides along the blade and locks, allowing you to transfer a distance accurately and hold it while you draw a line with a pencil. The Combination Square is right up there with the claw hammer, pencil, and tape as tools that every carpenter carries all the time. Small enough to fit in your back pocket this tool is indispensable.