3.7V Cordle Grinder Electric Drill Rotary Tool 3-Speed Adjustable Mini Engraving Pen Cutting PolishingWith Dremel Acceories Product parameters Brand Name: SHENHAOXU Type name: Mini Drill Battery:Lithium Charging time:2hours Charge Voltage: 5V DC (USB) Collect Chuck Diameter: 0.5-3.2mm Speed:3500/10500/16000rpm/min EngravingOutput Voltage: 3.7V / 10A Rated Voltage:110V- 220V Features: 1.Durable And Reliable -Small volume, light weight, easily carry, comfort grip handle, offers better control while drilling., convenient to use. 2.Regulating Speed-This electric carving tool has 3 speed adjustment,speed adjustment range:3000-16000 r/min. 3.Perfect Grinder - Perfect electric grinder for cutting, engraving, milling, grinding, polishing, removing and drilling. The grinder engraving kit is neceary for DIY carving and grinding. 4.Suitable for jade agate, nuclear carving, wood carving, grinding aluminum plate, thin copper board, plastic board, chipboard, printed circuit board, epoxy board. 5.Chuck head:0.5mm~3.2mm For Safe Use:1. When you finish using the unit, switch off the motor and ensure that all moving parts have come to a complete standstill.2. Before using additional acceories not included in this set, always compare the maximum allowed RPM of that specific acceory with the RPM of this tool.3. In case o electrical or mechanical malfunction, immediately switch off the tool.4. Do not activate switch when changing acceories.5. Never use the shaft lock when toll is running.6. Ensure that the collet size corresponds with the shaft size of the acceory.7. Store tool in locations where temperature will not exceed 50 degrees Celsius. NOTE:PSD-011-Acceories,Machine not included