Describe DEEP HOLE MARKING: This deep hole marker has a 32mm long nib design to easily mark deep holes or hard-to-reach places, easy to use WATERPROOF DESIGN: This long-tip marker is waterproof, quick-drying, and can be used on a variety of surfaces such as wood, metal, glass, and plastic Quick-drying: The long-headed deep-hole pen is quick-drying, so you don't have to worry about dizziness after writing, and the color is not easy to fade, and it is durable High Quality Material: Made of reliable ABS material, this woodworking pen is sturdy and durable, not easy to age, and has a long service life; long pen body, thin and round nib, handwriting is not easy to fade, easy to hold Scope of application: Multifunctional deep hole marking, suitable for position marking and drilling and furniture decoration, can also mark deep holes in metalworking, woodworking, automobile manufacturing, etc. Specification Dimensions: 2.51 x 0.35 inches. Color: red, black, blue, green. Material: ABS. Package includes 1*Deep hole marker