The Striker Mechanical Carpenter Pencil is a revolutionary mechanical carpenter pencil that is quickly replacing the traditional carpenter pencil on the job site. This pencil allows carpenters to make crisp, sharp lines right out of the packaging. When more lead is needed, simply press the cap of the pencil to advance the lead. The body of the pencil is thick-bodied, high-impact ABS plastic. Designed with as few parts as necessary in order to eliminate jamming due to sawdust, dirt and grime. Loaded with Dura Lead, which is 18% thicker than traditional lead and lasts 2-3x longer. Use 77-589 as replacement lead. Includes (3) pieces of DURALEAD (1 inside pencil; 2 inside tube).