Deep Hole Marking: This carpenter's pencil has an extended tip to reach hard-to-reach places that other carpenter's markers cannot reach, ideal for construction and masonry work. Built-in Pencil Sharpener: The pencil sharpener can be removed and used by rotating the tip of the mechanical pencil, your mechanical pencil sharpener will always sharpen for good precision. 3 colored leads: 2.8mm lead improves visibility for quality work, each construction pencil is preloaded with 6 leads including red, yellow and gray, and the lead quality is reliable, not easy to break , not easy to break. Stains on the hands. , is the favorite pencil of carpenters. Thoughtful Design: This deep hole marker pencil has grooves on the body to increase friction when holding the pen. The intimate design of the deep hole marker mechanical pencils reduces repetitive hand pain. Extra clip design makes it quick and easy to attach to your pocket. Multi-scene Application: This pica dry deep hole marker can be used to mark glass, metal, wood, carving accessories, widely used in construction, automobile, etc.