If you go through pencil lead like crazy, this bulk pack is a lifesaver. You get 144 leads total—that's 12 tubes, each with 12 leads inside. They're 0.7mm diameter and 2H hardness, which means they're on the harder side: great for precise lines, technical drawing, or writing that needs to stay sharp and not smudge easily. UNI-BALL quality is solid; these leads are strong (less breaking) and smooth to write with, delivering consistent darkness without skipping. They fit any automatic pencil (aka mechanical pencil) that takes 0.7mm refills—whether it's a cheap disposable one or a fancy drafting pencil. Toss a tube in your bag, keep one at your desk, one in the workshop… you'll always have spares. Amazing value for money compared to buying those tiny packs at the store. Perfect for students, artists, engineers, or anyone who prefers mechanical pencils over wood ones. No more running out at the worst moment!