Feature:1. Easy to Operate: Our metal engraving tools are easy to operate, especially for beginners,2. Applicability: Three level speed regulation, can be used to make key chains, DIY necklaces.3. Body Material: Made of high quality metal, durable, long term use without deformation.4. Portable: These portable and compact etching pens are easy to carry around, allowing you to enjoy easy hand drill jewelry making time.5. Multipurpose: This miniature electric grinder is mainly used for all kinds of stone, wood, almond core, PCB circuit board, plastic egg detail engraving, grinding, or for rust removal and trimming of small workpieces, nail polish; it can also be used in stainless steel, It can be carved and engraved on glass, ceramics and other planes, and the grinding and engraving are very favorable.Specification:Item Type: Engraving PenProduct Material: Metal, PlasticAdapt To Grinding Head Shank Diameter: Approx.2.35mm / 0.09inChuck Depth: Approx.25mm / 1inSpeed: 5000, 10000, 18000 Three LevelPower: 8WUse Time: The Third Gear Runs For More Than 1 Hour With No Load. If You Need To Use It For A Long Time, You Can Use It While ChargingBattery Type: Lithium Battery (Shipped With Built in Battery)Battery Capacity: 300mAhCharging: 80% Full In 30 Minutes, Full In 60 Minutes.Package List:1 x Host1 x Charging Cable1 x Drill Bit 1.0mm1 x Drill Bit 1.5mm1 x Slice 22mm1 x Slice 25mm1 x Slice 32mm1 x Slicing Connecting Rod1 x Metal Grinding Head30 x Grinding Needle1 x Grinding Needle Storage BoxNote:1. Electric grinding power is small, nonprofessional electric grinding, suitable for small engraving and grinding field.2. Do not place the electric grinder in a high temperature place above 40 degrees