About this item: Widely applicable: Guangna oil-based pens are suitable for various occasions such as automobile maintenance and refinishing, industrial markings, and metal surface markings. Durab le: Using high-quality oil-based ink, the color is bright and long-lasting, not easy to fade, and keeps the marks clear. Easy to carry: The pen body is light, easy to hold and operate, and easy to carry, so you can perform maintenance and marking work anytime and anywhere. Fast drying: Oil-based ink dries quickly, avoiding blur caused by touch and improving work efficiency. Multiple colors available: A variety of colors are available to meet the marking needs of different occasions and make the markings more personalized. Package:3pcs How to use this marker: 1. Before use, shake the pen body up and down several times, so that the ink mixed evenly. 2. Open the lid, erect the pen, nib up, and press the nib with your hand for about 3-4 seconds. 3. Pressed down the nib several times until the ink seeps. 4. The ink must be used up before it can be pressed again. 5. After writing must cover the cap to prevent ink evaporation 6. Please do not let this product close to the fire.