This 5mm Captive Halyard Shackle, part number 2107, features a polished forged stainless steel construction and a stamped screw pin diameter. It also includes a secondary pin for permanent secure attachment to the halyard and proper orientation. With a maximum working load of 540 kg or 1190 lb and a shackle pin diameter of 5 mm or 3/16 in, this shackle is a durable and reliable choice for your sailing needs.