Mechanical Carpenter Pencil   Designed to replace the clumsy hard to sharpen carpenter pencil. COMPLETE WITH 5 DURA LEADS •Each Dura Lead is 100mm long •Dura Lead is grooved for grip •Dura Lead is HB hardness •Dura Lead is 18% thicker than the average pencil lead • The Striker pencil body is ABS Plastic •The Striker pencil Jaw is polypropylene •Product has been fully tested in heat , cold and abuse. •It will survive being run over by a ¾ ton truck. •The Lead slides out with a push of the cap.