Koh-I-Noor Gioconda Artists' Leads for Lead Holders, Negro, 5.6mm x 80mm, are ideal for sketching, drawing and technical work. They feature bold, uniform color throughout the lead. Unused leads are stored in protective plastic case. Designed for use with Koh-I-Noor mechanical clutch lead holders (sold separately). Box of 6. Koh-I-Noor - Bringing you the best in professional grade drawing and design.