Description: - This deep hole marker pen is designed with a 1.18 inch/ 30 mm long tip, which can easily mark in deep holes or hard-to-reach places, convenient to use. - This long nib marker can be applied for various surfaces such as wood, metal, glass, and plastic. - Using good material, this carpenter pen is durable , has a long service life. - Waterproof and quick-drying, environmentally friendly and practical, not easy to fade after washing and smearing. - The nib is firm and reliable, and it is not easy to break. The pen holder has a simple ruler, which is convenient for construction and measurement. Specification: - Material: Plastic, Carbon Steel - Size: approx. 138x12mm/5.43x0.47inch - Color: Red, Blue, Black Package Includes: 3 Pieces Deep Hole Marker Pens Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.