This electric grinding machine is compact, small and convenient, easy to use. With strong power, more efficient operation. Features: Mini electric grinding machine, compact, small and convenient, easy to use. High-quality motor, strong power, more efficient operation. Drill punch, with clamping ranges of 0.7-1.2MM. Extra long power cord design, flexible and free to use. Convenient switch, simple operation, easy to get started. Specifications: Name: USB Grinding Machine Material: plastics Input voltage: 5-6V Item size: 25 * 25 * 115mm / 0.98 * 0.98 * 4.53in Package size: 130 * 80 * 50mm / 5.12 * 3.15 * 1.97in Package weight: 300g / 10.58ounce Packing List: 1 * USB Grinding Machine 3 * Drill Bit 1 * Wrench