5mm Shallow Bow ShackleForged stainless steel shackles are polished to a high luster and are stamped with the screw pin diameter.. Bow shackles are best for multidirectional loads. Shallow bow shackles are proportionally wider for their length than regular bow shackles.Specifications:. Shackle pin: 5mm / 3/16in. Weight: 14.5g / 0.51oz. Maximum working load: 540kg / 1190lb. Breaking load: 1080kg / 2380lb