I wanted to place this spiral book in a 3-ring binder with other materials to keep everything organized in one place for my students. The holes are spaced so far from the spiral edge that the binder won't lie flat and you can't fully open the spiral book when it's in the binder. This makes for a very difficult and unsteady surface to write assignments on and will probably destroy the binder in the end. There's not much point in putting 3-ring binder holes in a spiral notebook if it won't work in a binder. Wish the holes were slotted.