Features: Powerful cordless engraving pen with 54 interchangeable grinding head delivers precise cutting, carving, sanding, and polishing for functional material processing. Features a portable ergonomic grip, adjustable speed control (0 30,000 RPM), and long lasting battery providing 4 hour of continuous operation per charge. Ideal for DIY enthusiasts, jewelry makers, and professional craftsmen working on wood, metal, plastic, or ceramic projects. Perfect for detailed home workshops, art studios, and jewelry fabrication requiring multi material grinding tool and rotary engraving accuracy. Complete rotary tool set includes collets, wrenches, and diverse accessories for seamless switching between engraving pen functions and grinding applications. Specifications: Component:Plastic+Metal Battery capacity: 2000mAh Charging time: about 1.5hours Use durations: up to 4hours Size:Approx.14X5CM/5.51x1.97inches Color:Blue/Yellow/Pink Package Includes: 1Set Electric Engraver Pen note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.