Suitable for various kinds of stone carving, wood carving, olive carving, plastics carving, glass carving, ceramic carving, drilling and metal surface grinding, engraving, trimming, etc. Features: Portable Design: The Electric Grinding Pen is compact and lightweight, making it easy to carry and use anywhere, anytime. Wireless Design: This grinding pen features a wireless design for hassle-free operation and maximum maneuverability. USB Rechargeable: With its USB recharging capability, you don't need to worry its battery, making it perfect for on-the-go use. LED Light Feature: Equipped with an LED light, this grinding pen provides clear visibility even in lowlight conditions, ensuring accurate grinding. AdjustableSpeed Settings: With 5-speeds settings, this grinding pen allows you to choose the right speeds for your specific tasks, offering optimal control and versatility. Specifications: Type: Set A, Set B (optional) Clamping range: 0.5-3.2mm Speeds: 3000/6000/9000/12000/15000rpm (adjustable) Battery: 3.7V, 2000mAh Item size: 175 * 34mm / 6.9 * 13.3in Package size: 280 * 145 * 60mm / 11.0 * 5.7 * 2.4in Package weight: Set A: 218g / 7.7ounce Set B: 597g / 1.3lb Packing List: Set A: 1 * Engraving Pen 1 * USB Cable Set B: 1 * Engraving Pen 1 * USB Cable 10 * Big SandPaper Loop 12 * Small SandPaper Loop 5 * Wool Polishing Bit 1 * Cloth Polishing Bit 1 * Wool Grinding Bit 10 * GrindingWheel Bit 3 * Steel Wire Brush 3 * Copper Wire Brush 3 * Nylon Brush 2 * PolishingPaste 72 * Resin Cutting Pieces 12 * Sanded Polishing Film 1 * FlapDisc 1 * OilStone 3 * Connect Rod 1 * SelfTapping Rod 4 * Copper Collet 1 * Wrench 2 * Rubber GrindingWheel 10 * CorundumGrindingNeedle 6 * Drill bit 5 * MeshPatch 1 * RubberDisk