.Connecting links: 1)We can supply: Connecting Link, Round Link, Magic Lifting Link, Double Hole Clevis Round Link, Oblong Master Link 2) Material: forged alloy steel , Grade 80 3)Safety factor:4:1 4) Precise and performance: forged, heat treated,painted , 5)These connectors provide fast, easy assembly without the need for special tools or skills. Designed for attaching hooks,master links and other end fittings to chians.