This mechanical pencil says that it has “unbreakable lead” so I was intrigued and had to try it. When I first opened it, I extended the lead further then necessary and tried writing with it, it broke. Humph, that’s not supposed to happen... so I only extended the lead enough to be able to write and tried again, pressing as hard as possible on the paper and to my surprise, no breakage! The metal tip of the pencil moves up and down so that it protects the lead as you write. So no, the lead is *technically* not “unbreakable” but the pencil does protect the lead so you can use as much pressure as desired without having it break, unlike normal, old school, mechanical pencils. If you’re a heavy handed writer or just hate it when your lead snaps, this is the pencil for you!