I have this ruler and love it. One tip for those who want to get one, if you are like me, not exactly a mathematical genius, get some small colored dots from the office supply section of a store. Stick them on the ruler where you want to make cuts just to make sure you cut the right sized strips or blocks. For example, if you are cutting 2 1/2" strips, put a dot at 2 1/2, 5, 7 1/2 etc. You can reuse the dots or just use new ones each time. They are very inexpensive and save on cutting errors.