Replacement leads for use with our Pica-dry mechanical pencils. The black 2B lead makes a dark, easily visible mark on lumber or on smooth, hard surfaces such as tile. For better contrast on dark surfaces, colored 2B leads are available; black, yellow and red leads are water soluble and can be erased with a damp cloth, and water-resistant leads come in blue, green and white. H-hardness black leads yield a finer line.