THE UPPER AND LOWER FEEDING BODY CAN MAKE THE UPPER LAYER AND LOWER LAYER INTO CONSISTENCY. FINE SLOPE CLIMBING FUNTING AND CAN MAKE MULTI LAYERS INTO CONISSTENCY. CONNECTING ROD NEEDLE BODY, CAN PREVENT ERROR FROM REVERSING NEEDLE DISTANCE AND MAKE THE THREAD TRACE MORE BEAUTIFUL.IT’S SUITABLE FOR PROCESSING LEATHER,LEATHEROID, SOFA AND CASES.