Professional 12V Mini Grinding Set Drill Grinder Tool 1. Practical: The grinder engraving kit is necessary for DIY carving and grinding. This kit allows you to engrave in seconds to personalize or decorate almost any surface - metal, plastic, glass, ceramic, wood, leather, diamond, stone, etc. It's perfect for DIY creations, crafting. 2. Knob control on/off and steeples speed regulation: from 3,000 to 25,000 RPM (revolutions per minute).simple operation, small size, humanized design, comfortable wear-resistant, non-slip, small power, suitable for small engraving operations 3. Lightweight and compact pen-shaped design: The design of the body surface from fine lines to deep grooves provides a comfortable experience. Ergonomic grip for added comfort and stable control. 4. Wide range of uses: suitable for carving (nuclear carving/egg carving/bone carving/jade carving), cutting, polishing, engraving, milling, grinding, trimming, removing and drilling, grinding.