Striker 77589 Dura Lead Replacement Lead for Striker Mechanical Carpenter Pencil, Black No more sharpening, safer and actually has more usable lead than a traditional carpenter pencil Strong and rugged lead-quickly shapable for a razor sharp and durable tip 18-percent thicker than average carpenter pencil lead Grooved for a positive interlock with the striker construction pencil Quickly shape the lead for a razor sharp and durable tip