Mini Electric Grinder Set USB Rechargeable Portable Grinding Polishing Engraving Machine with

Feature: 1. USB CHARGING: This electric polishing pen is rechargeable, equipped with a USB cable and built in 300mAh lithium battery, making it easy to use anytime, anywhere. 2. SAFE OPERATION: Built in safety circuit board and smart overload protection chip, it will automatically cut off the power supply when the working resistance is too high. 3. HIGH CONCENTRICITY: The integrated design of precise bearings and extended rotating shafts effectively improves the concentricity of electric grinding pen rotation. 4. SPEED REGULATION: The grinder pen has a working power of up to 10W, 3 levels rotational speed, adjustable range of 50001800rpm, suitable for different materials. 5. STABLE CLAMPING: The replaceable core copper chuck is firmly clamped, stable and not skewed, making it easy to achieve precise punching and engraving. 6. ACCURATE CONTROL: Lightweight aluminum alloy frame and ergonomic grip provide precise fingertip control, with low working noise, suitable for use in quiet scenes. Specification: Item Type: Electric Grinder Pen Material: Aluminum Alloy Battery: 1 x 300mAh 4.2V Lithium Battery (built in battery) Speed: 5000rpm (low speed), 10000rpm (medium speed), 18000rpm (high speed) Power: 10W. Package List: 1 x Polishing Pen1 x USB Cable2 x Wool Wheels1 x Connecting Rod2 x Drill Bits3 x Cutting Blades5 x Grinding HeadsUSB CHARGING: This electric polishing pen is rechargeable, equipped with a USB cable and built in 300mAh lithium battery, making it easy to use anytime, anywhere. SAFE OPERATION: Built in safety circuit board and smart overload protection chip, it will automatically cut off the power supply when the working resistance is too high. HIGH CONCENTRICITY: The integrated design of precise bearings and extended rotating shafts effectively improves the concentricity of electric grinding pen rotation. SPEED REGULATION: The grinder pen has a working power of up to 10W, 3 levels rotational speed, adjustable range of 50001800rpm, suitable for different materials. STABLE CLAMPING: The replaceable core copper chuck is firmly clamped, stable and not skewed, making it easy to achieve precise punching and engraving.