Twist-Erase III Mechanical Pencils ... Protective tip design stabilizes lead to reduce lead breakage Latex-free grip delivers maximum comfort and control With the jumbo Twist-Up Eraser, you ...

The history of erasers dates back to the 1770s, when bread was the primary tool used to erase pencil markings. People would roll up and moisten bread to remove graphite marks effectively.

The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...