Kaweco 3.2mm leads, 5B hardness, in a box of 6, are the consumable for the thick-lead clutch pencils in the Sport line, such as the Classic Sport, Frosted Sport, and Skyline Sport. The 5B hardness is soft, ideal for sketching and drawing with varying line thickness depending on the angle and pressure applied, unlike the harder leads used for everyday writing. It's a preferred option for those who already own a 3.2mm Kaweco mechanical pencil and need to replace the leads.