The Harken 6mm Bow Shackle Part No. 2110 has a maximum working load of 750 kg (1650 lb). Made of forged stainless steel, these shackles are highly polished and stamped with the diameter of the screw pin. With a 6mm (1/4in) shackle pin, they are ideal for handling multidirectional loads and providing ample articulation with their large interior opening when attached to a round bail.