Product Description Double Needle and Hook Boots Sewing Machine is heavy duty multi-useful sewing machine, with double bottom thread bobbin case system, to make inside double thread line is also paralleled just like surface double thread line . this machine is not only for stitching long boots shoes, it's also Tent Sewing Machine and Case Sewing Machine. 1, It is suitable for side seam stitching and outsole edge lock stitching of middle size sports shoes, and casual shoes. 2, With a single needle, ox-horn arm. 3. All parts were made by CNC machine, all parts are of great quality. 4. Use electron motor to control the speed, it is easy to change the speed, and break controlled by computer. 5. This machine thread hook use chain to drive, durable and waterproof, 6. This machine's thread hook, chain, ring and so on are imported from ZUOWEN in Jason.