Pencils used for technical drawing have specific characteristics: ^{darnelltechnical.com}+1 ^{1 2}

• They have harder lead cores for more precise lines.
• The point is less likely to break.
• Commonly used technical drawing pencils are labeled with a number and letter code, such as HB, H, and 2H.
• Drafting pencils or technical pencils are used by architects, drafting technicians, and designers for precision technical drawing. ^{penvibe.com 2}
• Different hardness levels are available for pencils and pencil leads, with hard pencils used for laying out light lines that are not intended to be seen by the reader. ^{engineeringtechnology.org 3}