... Strong functions, easy operation, sturdy, durable, reliable performance, reasonable price, suitable for letters, images engraving on copper, aluminum products, ... Speed0-6000mm/s Rotation Speed of Spindle Motor6000-24000rpmEngraving ToolΦ3.175 ,Φ4,Φ6(optional)Dictate FormatG-Code ... 7.Vacuum System(optional) 1500W 300x250x40mm SD3025MV Mini CNC Router CNC Engraver processing small precision instruments