Mechanical Pencil Made of Reinforcing Steel With a 5.6-mm Lead

It can’t be heavy enough for the engineers: this construction site writing implement is for them. The brainchild of German architect Axel P. Huhold has become the joy of all engineers, architects, construction and steel workers who like to have a firm grip on their pencils. The mechanical pencil (for 5.6 mm graphite refills) is made from reinforcement rod. It is not light but sits well in the hand and is predestined to make sketches. And it comes in a receptacle made of what else: concrete.

Drop action pencils, propelling pencils and rectable pencils have two things in store the wooden pencil cannot provide:

1.) They are available in a variety of mine formats, which in turn are catering to a variety of purposes - from technical drawing to large-format sketching and signing, and 2.) they are sustainable because they are refillable.