173Pcs Cordless Rotary Tool 3.7V Li-Ion Power 5 Variable Speed USB Charging Multi-Purpose for Light-Duty DIY Crafting Polishing Jade Pet Nail Sharpening Features: And Reliable: Small volume, light weight, easily carry, comfort grip handle, offers better control while drilling., convenient e. Regulating Speed: This electric carving tool has 5 speed adjustment, speed adjustment range: 3000/6000/9000/12000/15000 r/min. Complete Accessories: Equipped with 173pcs accessories for drilling, all ready and complete. With LED lights, it can be used in different environments. Perfect Grinder: Perfect electric grinder for cutting, engraving, milling, grinding, polishing, removing and drilling. The grinder engraving kit is necessary for DIY carving and grinding. Suitable for jade agate, nuclear carving, wood carving, grinding aluminum plate, thin copper board, plastic board, chipboard, printed circuit board, epoxy board. Specifications: Material: ABS+Metal Color: Green Collet Chuck Diameter: 0.5-3.2mm Rated Power Input: 12W No-Load Speed:14000 r/min 5 Level Variable Speed: 3000/6000/9000/12000/15000 r/min Idling Time: 2 hours Polishing Working Time: Up to 1 hours Output Voltage: 3.7V / 10A Input Voltage: DC 5V USB Item Size: 178 * 35 * 25mm / 7.01 * 1.38 * 0.98in Item Weight: 126g / 4.44oz Package Weight: 480g / 16.93oz Package Size: 21 * 8 * 6cm / 8.27 * 3.15 * 2.36in Package List: 1 * Mini Grinder Machine 173 * Accessories 1 * User Manual (English)