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2. Mechanical pencil - Wikipedia

   en.wikipedia.org/wiki/Mechanical_pencil

   Screw-based pencils advance the lead by twisting a screw mechanism, which moves a propelling pin or lead carrier down the barrel of the pencil. Lead is not fed from an internal reservoir, but must be replaced manually, usually from the front. This was the most common type up until the earlier part of the mid-twentieth century.

3. Technical drawing tool - Wikipedia

   en.wikipedia.org/wiki/Technical_drawing_tool

   Video of a 1930s dotted-line drawing pen. Pencils in use are usually mechanical pencils with a standard lead thickness. The usual line widths are 0.35 mm, 0.5 mm, 0.7 mm and 1.0 mm. Hardness varies usually from HB to 2H. Softer lead gives a better contrast, but harder lead gives a more accurate line.

4. Writing implement - Wikipedia

   en.wikipedia.org/wiki/Writing_implement

   A dip pen has a steel nib (the pen proper) and a pen-holder. Dip pens are very versatile, as the pen-holder can accommodate a wide variety of nibs that are specialized for different purposes: copperplate writing, mapping pens, and five-pointed nibs for drawing music staves. They can be used with most types of ink, some of which are incompatible ...

5. Gillott's - Wikipedia

   en.wikipedia.org/wiki/Gillott's

   Gillot's 291 pens with their holder. Nevertheless, ... Gillott manufactured fine-point dip pens, suitable for drawing, mapping and calligraphy purposes. Some of the ...

6. Technical pen - Wikipedia

   en.wikipedia.org/wiki/Technical_pen

   Staedtler technical pens Staedtler technical pen divided in parts in comparison with 1 cent euro coin Macro image of a 0.7 mm Rotring Rapidograph nib showing the flow control wire. A technical pen is a specialized instrument used by an engineer, architect, or drafter to make lines of constant width for architectural, engineering, or technical ...

7. Lead pencil - Wikipedia

   en.wikipedia.org/wiki/Lead_pencil

   Lead pencil may refer to: Pencil , a writing implement or art medium usually constructed of a narrow, solid pigment core inside a protective casing Mechanical pencil , a pencil with mechanically extendable solid pigment core called a lead