The Rite in the Rain’s Lead Refills give the assurance of more writing hours in all kinds of weather, on all types of terrain. The Rite in the Rain Mechanical Pencil is a reliable writing tool during field work, writing through water, grease, sweat, mud, and more. A mechanical pencil running out of lead may seem like a simple problem, but the inability to write things down while out in the field may make or break the completion of a project. Prevent coming back to the office with incomplete data because of writing tools that failed to work. Always bring extra lead refills for the mechanical pencil to be used. Each Rite in the Rain Mechanical Pencil Lead Refill is break-resistant, with a hefty 1.1 mm diameter, with HB No. 2 hardness. Despite its tough composition, these lead tips are designed to write smoothly on Rite in the Rain products. Each pack contains 12 lead refills and may be stored in the Rite in the Rain Mechanical Pencil barrel, right below the Eraser Refills.