Bow shaped shackle (G209) shackle, the buckle body can be forged with killed steel, and the shaft pin can be machined after bar forging. When in use, the buckle body and pin should be checked for severe wear, deformation, and fatigue cracks. When in use, the horizontal spacing must not be subjected to tension, and the axle pin must be inserted with a safety pin. After the shaft pin is correctly assembled, the width inside the buckle should not be significantly reduced, and the threaded connection should be good.