This is a great and hardwearing mechanical pencil. The 9mm lead holds up well and doesn't snap too easily. I use it nearly everyday both to take notes in class and to make notes in books (where I don't like to use pens). The leads feed in smoothly and unlike other mechanical pencils I have used it doesn't jam up. I liked to so much I bought a second one to keep at my work place and one at home so as not to find myself without. A really excellent product.