Feature:1. The speed range of the electric miniature engraving pen is 5000‑10000‑18000 three levels (revolutions per minute)2. Can easily control the engraving/drawing way. Generally, the speed of metal and wood is lower, and the speed of glass and ceramics is faster3. You can hold easily and comfortably, just like a pen, you can perform complex tasks without excessive pressure on your wrist or hand4. This DIY vibration carving tool set is suitable for metal, glass, nails, plastic, wood, leather, etc.5. Aluminum alloy material with light weight, good strength and resistanceSpec:Item Type: Electric Micro Engraver PenMaterial: Aluminum alloyAdapt to Grinding Head Shank Diameter: Approx. 3mm / 0.1inChuck Depth: Approx. 25mm / 1inSpeed: 5000-10000-18000 three levelsPower: 10WBattery Voltage: 4.2VBattery Capacity: 300mAhBattery Type: Lithium batteryUse Time: Three levels no-load operation for more than 1 hour, if you need to use for a long time, you can use it while charging.Charging: 80% can be charged in 30 minutes, fully charged in 60 minutes.Charging Port: TYPE-C is the same as the charging port for smartphones.Package List:1 x Main Body10 x Matte Sheet37 x Grinding Needle5 x Sponge1 x Hex Wrench