Description: Material: ABS Color: gray / Green / red Diameter of spring chuck: 0.5-3.2mm Rated power input: 10W No load speed: 5000-15000 rpm Idle time: 2 hours Polishing time: up to 1 hour Output voltage: 3.7v/10a Input voltage: DC 5V USB Packing weight: about. 183g features: 1. Durable and reliable - small volume, light weight, easy to carry, comfortable grip, better control when drilling, easy to use. 2. Speed regulation - this electric carving tool has three speed regulation, speed regulation range: 5000-15000 rpm. 3. Complete accessories - with 25 drilling accessories, everything is ready. 4. Perfect grinder - perfect electric grinder for cutting, carving, milling, grinding, polishing, removing and drilling. Grinding machine carving kit is required for DIY carving and grinding. 5. Suitable for jade, agate, nuclear carving, wood carving, aluminum plate, thin copper plate, plastic plate, particleboard, printed circuit board, epoxy board, etc. The package includes: 1 USB drill 1 USB cable (5V DC) 1 clamp mandrel 1 rubber wheel 1 tapping rod 1 circular saw blade Two diamond grinding needles 2 pieces of wool polishing wheel 3 sandpaper rings flower 5 grinding wheel heads 6 electric drill bit chucks (0.5mm, 1.0mm, 1.5mm, 2.4mm, 3.0mm, 3.2mm) 1 storage box