Stepless SpeedFrom 3000 to 20,000 RPM (revolutions per minute) for easily controlling the engraving/drawing path. Generally, the slow speed is for metal and wood, and the high speed is for glass and ceramic.Multifunctional UseThe micro engraving tool set scratch engravers machines are suitable for hole drilling, grinding, engraving and cutting. There are 6 different polishing heads with slip rings. And 24 unique stencils meet all your needs, from fine lines to deep grooves that make it easier and faster to polish and complete any engraving.Ergonomic HandleErgonomic handle provides extra comfort and control smoothly, so you can complete complicated jobs without putting excessive pressure on your wrist or hand. The plotter pen is suitable for particularly fine and delicate lines and is ideal for marking jewelry or other tiny objects such as rings and pendants etc.Durable and reliableCan be used as an engraver electric or mini rotary tool. Can be used for engraving, polishing wood, metal, leather, glass, plastic, acrylic nails, animal manicure, ceramics, wood and leather. You can engrave to protect against theft, etc.Product Color:Upgraded VersionThe kits contain all kinds of accessories including you may need for the user manual. There is no limit to what you can engrave.Why:This fine line plotter pen is suitable for marking, writing and engraving.This jewelry tool set is suitable for wide strokes and is suitable for engraving, drilling, carving, grinding, sharpening, grinding, polishing, etc.Compact ergonomic pen-shaped design allows for greater control and convenience.2-in-1 rotary knob controls ON/OFF and speedTechnical data of engraving pen: AC input: 100V~240V, 50~60HzDC output: 9V/1000mAU/min (revolutions per minute): speed continuously from 3000 to 20000Safety instructions:1. Do not touch or collect the bit, otherwise you may injure yourself.2. Do not immerse the tool in water or use it near water.3. You can wear safety goggles or dust mask to keep dust away from your eyes4. Always remove the plug from the socket when changing bits or when not in use.5. Store the tool in a dry place and keep it out of the reach of children.