Customers asked for a really long time when we would make a line of pencils, and so here we are! All metal construction for an heirloom quality pencil that you’ll be able to pass down to your children! We use the Schmidt DSM2007 mechanism that comes in 0.5mm lead sizes. It is an all metal construction with a plastic plunger in the back that is built to last. Extra lead packs are available in the spare parts section. The erasers are replaceable and fit in the back of the pencils with a friction fit. You'll also be able to add more to your order in the spare parts section.