Features: The grinder engraving kit is neceary for DIY carving and grinding.This electric carving tool has very mini grinder body, convenient to use.Suitable for jade agate nuclear carving wood carving.Electric portable drill, durable and reliable.Small volume, light weight, easily carry, comfort grip handle.For grinding aluminum plate, thin copper board, plastic board, chipboard, printed circuit board, epoxy board.Perfect electric grinder for cutting, engraving, milling, grinding, polishing, removing and drilling. About HB-202 Product parametersType name: 5-speed-DrillBattery:Lithium BatteryCharging time:2hoursCharge Voltage: 5V DC (USB)Collect Chuck Diameter: 0.5-3.2mmSpeed:3000/6000/9000/12000/15000rpmEngravingOutput Voltage: 3.7VRated Input Power: 10WRated Voltage: 110V~220VFeatures:1.LED working light2.Regulating Speed-This electric carving tool has 5 speed adjustment,speed adjustment range:3000-15000 r/min.3.Complete Acceories-Equipped with 24pcs acceories for drilling,all ready and complete.4.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.5.Suitable for jade agate, nuclear carving, wood carving, grinding aluminum plate, thin copper board, plastic board, chipboard, printed circuit board, epoxy board.6.Durable And Reliable -Small volume, light weight, easily carry, comfort grip handle, offers better control while drilling,convenient to use.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.