These 6 inch rulers do what they are supposed to measure ;) I bought them because I make jewelry for a living and I need smaller rulers to see the final product to eat. because it is easier than the full size one. I also like that the measurement starts at the end of the ruler and not 1/8 inch like most. I don't really need 3 but it was a better deal also I tend to lose things and I can put one with my amenity kit when I'm in an activity.