The OX Pro Series Tuff Carbon Marking Pencil value pack is designed for marking through holes or in other tight areas on any jobsite. The OX Pro Tuff Carbon marking pencil uses a long needle-nose tip to mark in hard-to-reach spots, a stainless steel lead feed tube for easy refilling and continued use. Its reliable construction, built-in sharpener, tool belt holster, and one-click advance provides reliability in jobsite conditions and ease-of-use.