Leads for any 0.5mm mechanical pencil. These particular refills come in 5 different hardnesses and have a small amount of diamond dust mixed into to the graphite, which is supposed to make them extra strong. They are smoother and more reliable than your average lead.
Mitsubishi Pencil Company (which is unrelated to Mitsubishi, the conglomerate), was founded in Tokyo in 1887 as the first Japanese pencil manufacturer. Though they’re still known for their quality pencils, Mitsubishi also makes a full range of highly innovative pens under the brand Uni, which stands for “Unique”.
- Lead Size: