1. Specification: Power: 25W Voltage: 110v-240v Speed: 6000-15000r / min Clamping diameter: 2.35mm-3.2mm (applicable to all 2.35mm grinding heads, reducers, etc.) Size: 125x16mm / 4.92x0.63 inch 2. Scope of application Miniature carving / nuclear carving / egg carving / jade carving / wood carving / stone carving / plastic/ Bone / Bodhi / stationery / jade carving, drilling, cutting, polishing and grinding 3. Note: -It needs to be fully charged before the first use. -Please allow a difference of 1-3mm due to manual measurement. -It is not suitable for large-scale engraving, stamping, cutting and grinding projects. -Slight noise and temperature during machine operation are normal. -During shipment, some powder may fall on the surface of accessories. Please understand that they are brand new. Grinding machine drilling machine | engraving machine 3535; Engraving pen rotary polishing machine 35; include: