Mechanical pencils have thin graphite leads that are pushed out through the tip using a button mechanism. The leads range from three to seven millimeters thick and provide consistent line thickness, eliminating the need for sharpening. They are commonly used for technical drawing jobs, such as drafting and architecture. Some mechanical pencils have small erasers fitted into one end
Lead: Choose a mechanical pencil with a light lead for drawing construction lines in technical drawings. For sketching, choose a medium to heavy leads. Make sure the lead does not spread or stain the paper when erased.
Grip: Choose a mechanical pencil with a ribbed or rubber-covered barrel to improve grip. Make sure it fits comfortably into your hand, especially for extensive drawing work.
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