1. Durable materials: This glass scriber features a durable tungsten carbide tip and an aluminum blade body, capable of scribing hard materials, including hardened steel, stainless steel, and glass. 2. Permanent magnets: These scribing tools are equipped with permanent magnets that can attract iron and steel chips in hard - to - reach places. 3. Easy to use: With a convenient pen - style design and a handy pocket clip, the knurled aluminum handle ensures maximum controllability and comfort. When not in use, the tungsten carbide tip can be reversed and stored. 4. Wide range of uses: These tungsten carbide scribers can be used to scribe and etch any type of metal, glass, concrete, gemstones, tiles, ceramics, plastics, etc. The tool provides precise fine - line marking function. It can also be given as a gift to carving enthusiasts. 5. Color: Silver 6. Material: Metal 7. Package contents: - 4 tungsten carbide scribers - 8 marking heads Only the above package contents are included, and no other products are included. 8. Precautions: Light reflection and different monitors may cause the color of the item in the picture to vary slightly from the actual product. The allowable measurement error is plus or minus 1 - 3 cm.