I have a few rafter squares that I usually use when doing projects for the square, plus a few combo squares when needed. I ordered them mainly because I like the color red and also because they looked like they would work well when I needed to attach things together, especially the rafter squares. I like them and they are very durable. They don't appear to be exactly square, but they're pretty close. Although this may be the problem of my other squares. However, they are great for building cabinets.