Common mechanical pencils come in sizes to accommodate 0.5, 0.7, and 0.9 mm leads, but there are bigger and smaller ones available. Perhaps one of those really large drafting lead holders could be ...

YStudio’s Sketching Pencil offers a 2mm lead for a thicker, richer line. You can also get the hexagonal barrel engraved. The company’s conventional mechanical pencils can be paired it with an elegant ...