Engraving pen is mainly used for engraving or Grinding on glass, metal, wood,, plastic,ceramics,etc,also can polish your nail or what ever items you wantAdjusted Speed Engraving: Stepless speed from 3,000 to 20,000 RPM.Usually,Low speed for metal\/wood,fast speed for glass\/ceramic,you can a relevant mode required for the efficient and safe utilization of the deviceEASY TO : Turn on ON\/OFF engraver pen. the switch to find the speed you needed. And then just holds it like holding a pen, making you easily control the engraving\/drawing path 52 Accessories and Scriber Included:The DIY tool kitincludes all kinds of accessories can widely be used in Engraving,Carving, Sanding, Polishing (Nail Polishing), DrillingColour: Blackmaterial: metalAC input: 100-240VDC output: 9V \/ 1000mANo continuous speed: 3,000-20,000 RPM:This Scriber pen is suitable for strokes, suitable for marking, and etchingThis jewelry tool set is suitable for wide strokes, suitable for engraving, drilling, engraving, grinding, grinding, grinding, grinding, polishing, etc.Plug Type:US Plug,it applies to Canada, India, Japan, Mexico, Thailand,taiwan the United States, the Philippines and so on.packing list:1 * carving tool2 packs (6 * polishing head and 6 sanding rings) (shaft diameter: 2.35mm, bore diameter: 6.35mm)30 * Different points (10 points, 5 round bits, 4 -shaped bits, 11 flat bits)16 * version templates (8 pattern templates, 8 letter \/ number templates)1 * adapter1 * Sculpting pen1 * user manualOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +\/- 1-3cm.