Pencil Lead Refills

Lead is the cheapest part of a mechanical pencil and the part that most changes how it feels. Two numbers matter: the diameter, which must match your pencil exactly, and the grade, which sets darkness and hardness.

Grades run from hard to soft. 2H and H give a pale, crisp line that resists smudging — the drafting choice. HB and F are the everyday middle ground. B and 2B are darker and smoother, far kinder to a light hand and much better for sketching, at the cost of more smudging. If your writing looks faint and you press hard to compensate, moving from HB to B will do more for your comfort than any new pen.

Diameters of 0.3, 0.5, 0.7 and 0.9 mm are not interchangeable. Fine 0.3 mm lead in particular breaks easily and wants a light touch; 0.7 mm is the most forgiving. Buy a tube of each grade once — they last a very long time and the difference is immediate.

Loading is straightforward but worth doing carefully. Click the mechanism, drop the sticks into the barrel one or two at a time rather than forcing in a whole tube, and never mix diameters. If a pencil jams, the usual cause is a broken fragment in the tip: remove the remaining lead, press the button and gently work the fragment out with the cleaning pin many pencils hide under the eraser. Forcing a fresh stick against a jam is how mechanisms get destroyed.