Muti-spindle Wood Engraving Router 1-Air-cooling spindle 2-Taida inverter 3- ... (optional)Application:1. Furniture: plate, office furniture, doors, cabinets.2. Wood products: speakers, games cabinets, computer tables, sewing machines, musical instruments ... on Internet & Telephone, free instructions and problem solving. Muti-spindle Wood Engraving Router SY-1625-6