General description The Set of 4 Tungsten Carbide Tip Engraving Pens is an essential tool for creating clean and precise lines on a variety of hardened materials, including hardened steel, stainless steel, ceramics, and glass. These pens are designed for versatility, making them suitable for use on wood, metal, plastic, ceramic, and glass. Technical specifications Material: Tungsten carbide tip Includes: 4 pens Features: Reversible tip to prevent punctures in clothing Magnet: Powerful alloy magnet for collecting small parts and extracting steel shards/chips Other information Comes with a protective cap for the tungsten carbide tip when not in use Practical pocket clip for easy access