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 ...

[Franklinstein] however decided to design a high-speed eraser integrated into a mechanical pencil that brings the whole concept straight back to the pointless category, although not without ...

Twist-Erase III Mechanical Pencils feature a sturdy ... grip delivers maximum comfort and control With the jumbo Twist-Up Eraser, you'll suffer no smudges, no paper tears and no ghosts Each ...

Mechanical erasers are handy for erasing small areas with precision, while pencil erasers are convenient for quick corrections on the go. To add depth and dimension to your sketches, consider ...