Features: 1.Wide range of uses, 20mm long tip, depth marking: Suitable for marking deep holes for home improvement, hardware processing, automotive manufacturing and other industrial applications. 2.Water resistant ink, fast drying: Our team has developed marker inks that are resistant to fading, fast drying, xylene free etc. Ideal for marking deep holes or hard-to-reach areas for inspection. 3.Sturdy and comfortable: Made of high quality ABS material, durable, sturdy and not easy to age. Stable and reliable overall dimensions, comfortable to the touch and ergonomic. 4.Perfect for marking in deep holes or difficult to detect places. 5.Waterproof, smudge-proof and quick-drying, not easy to fade. Notice: Actual color vary from that of the image due to computer settings. Please allow deviations of 1-3cm due to manual measurement. includes: 1/3pcs x Marker Pens