3800RPM High-Speed Pneumatic Engraving: Operates at 3800 RPM striking speed under standard 4.5 kg/cm² working pressure, delivers rapid, crisp permanent markings on hard workpieces and cuts down long workshop engraving time greatly Wearproof Carbide Engraving Tip: Fitted with high-hardness carbide stylus (62-65) that penetrates stainless steel, aluminum, glass, ceramic and plastic effortlessly. Lightweight Ergonomic Design: Exclusive pen-shaped handheld design with lightweight build, smooth grip enables precise fine-line control just like holding a regular writing pen Rugged Industrial Build: Heavy-duty internal mechanical structure ensures stable consistent performance in rough workshop environments; 1/4 inch air inlet connects seamlessly to ordinary shop air compressors for instant plug-and-play use Multi-Scenario Marking Use: Suitable for marking metal parts, tools, molds, plastic components, glassware, and ceramics – perfect for workshop identification, custom engraving, asset tagging, and personalization projects of all kinds