Striker Mechanical Carpenter Pencil is designed for durability and reliability, constructed from high-impact plastic that can withstand extreme pressure, even being run over by a 3/4 ton truck on concrete. This pencil features a convenient pocket clip for easy carrying and jaws that securely hold the Dura Lead in place, with a simple press of the cap to release the lead. It comes with a 3-piece lead refill and is refillable, making it a practical choice for professionals. For lead refills, refer to Model No. 77-589, 77-599, and 77-609. Model Number: 770629