Deep-hole tool: The deep-hole carpenter pencil is designed with an elongated, needle-nosed tip 45mm in length that can reach hard-to-reach areas where other carpenter markers won't go, suitable for marking through holes or in other narrow areas. Mechanical pencil: carpenter's pencils do not slip from the fingers and repetitive marks cause less pain. The pen clip can be easily attached to the pocket, easy to use and not easy to lose, gaining efficiency, suitable for construction and masons. Easy to clean material and visible color: the refills crayons are made of wax, which is water-soluble and can be wiped with a damp cloth when you mark badly or make the original place more beautiful and streak-free. Drawing on a dark surface is no longer a problem thanks to the yellow and red pencil refills.