The universal dark gray lead that comes in the pencil writes on almost any material surface, it doesn't matter if they are dry or wet, shiny or rough, dusty or greasy.
Easy to clean the lead from the shiny surface with a damp cloth
Wide range of uses as many types and colors of lead are available for the pencil. Both water-resistant and water-soluble lead, in light or dark colors.
A convenient cover that protects the pencil, and has a belt attachment, so it's easy to put it in a good place.
Patented on the end of the cap. Easy to sharpen the tip of the lead if needed.
Strong equipment that advances the lead to the stainless tip.
Easy to load new leads into the pencil
Very durable and strong pencil due to good design. For example, it has been well blocked to prevent dust from entering the pencil and interfering with the recording mechanism