Feature:1. Equipped with 9pcs grinding bits of different specifications to meet different needs.2. Large capacity rechargeable battery, stable and safer output.3. Fine craftsmanship motor, making it output strong power stably, and can work continuously for a long time with high concentricity.4. Three kinds of speed adjustment, apply different degrees of polish needs.5. Fine quality steel body, increase the weight and hold it firmly.Specification:Suitable for various chip grinding, motherboards cutting, brackets cutting, screw removal, etc.Features:Equipped with 9pcs grinding bits of different specifications to meet different needs.Large capacity rechargeable battery, stable and safer output.Fine craftsmanship motor, making it output strong power stably, and can work continuously for a long time with high concentricity.Three kinds of speed adjustment, apply different degrees of polish needs.Fine quality steel body, increase the weight and hold it firmly.Specifications:Color: blueMaterial: metalRotating speed: 37000rpm/minVoltage: 3.6VClamping diameter: 2.35mmBattery: 3.7V, 280mAhItem size: 155 * 16 * 16mm / 6.1 * 0.6 * 0.6inPackage size: 142 * 33 * 20mm / 5.6 * 1.3 * 0.8inPackage weight: 101g / 3.6ounce.Package List:1 * Engraving Pen1 * USB Cable9 * Grinding Bits