I bought these as a class set to use with my 4th graders so we would all have the same protractor. After using them for 2 years, I appreciate their strength and durability. However, I wish that they had a hole that you could use to to draw a point or line up with a point rather than a clear bubble. I also wish that the product description would indicate that the protractor measures up to the 0.5 degree. We don't need this feature in 4th grade and it confuses the students. I do like that the measurement scale has 0 and 180 degrees unlike some other protractors that I have looked at. Overall, a good, affordable product.