describe: Mini electric engraving pen electric grinder polishing mini hand drill tool Features: This mini drill cannot provide high precision work. But it is a good tool for DIY polishing or carving. Small size, light weight, easy to carry, comfortable handle grip, and provide better control when drilling. The perfect electric grinder for cutting, engraving, milling, grinding, polishing, removing and drilling. This is a smart and useful hand tool, suitable for working on PCB boards, thin metals, and thin alumni. Aluminum alloy shell, sandblasted appearance, long service life. It is very suitable for drilling holes in wood, plastic, paper, metal plate, acrylic, mixed media, etc. (It cannot be used for high hardness materials. Please note: it cannot be used for high hardness materials such as iron.) describe: Great DIY tool for grinding, drilling, auxiliary cutting, micro-engraving, dust removal, etc. Easy to operate and replace drill bits or other accessories. Cordless design, small size, light weight, easy to use and carry. Equipped with a mini drill bit, it can be applied to various materials such as PVC, plastic board, wood board, thin board and so on. Equipped with a USB charger to make work more convenient. Specification: Material: Aluminum Design: Cordless design Color: silver Packing size: 15x10x5cm Specifications: Material: Aluminum Design: Cordless Design Color: Silver Size: 135 x 24 mm (without drill) Power supply: 1 18650 battery (2 batteries included), 3.7V 2600mAh Charger: input AC100-240V, 47 -63Hz; output 3.7V / 450mA charger LED display: the LED is red when charging, and the LED is green when fully charged. Charger technology: anti-overcharge, anti-short circuit, anti-reverse charge Note: Do not use the charger to charge other batteries. Power supply: USB standard plug The package includes: 1 X Micro Electric Drill Grinding Rotary Tool Kit