Almost every mechanical pencil is marked with its diameter somewhere on the clip or the barrel, and that figure is the only thing that matters when restocking. Finer leads suit technical drawing and small handwriting and snap under pressure; the wider size is more forgiving for everyday note taking. Grade sits on top of that and follows the same H to B scale. See pencil leads, mechanical pencils and drawing pencils.

Mechanical pencil lead refills arranged on a bright drafting desk with pacer pencils, graph paper, ruler and technical sketches.

Mechanical Pencil Leads for Pacer Pencils

Mechanical pencil leads for pacer pencils, drafting and everyday writing. Shop lead refills for school and office.