[Features] ● Uses the same core as the pencil used for construction, smooth and less wear. ●We adopt the world's finest graphite (black lead) with high purity and fine particles. High heat treatment and appropriate amount of oil make this a thick, strong and smooth writing nib for construction use.
[Applications] ● Refills for SHARP pencils with corners for construction. ●Sumitsuke SHARP pencil refill for construction
