Part No. 2106 Forged stainless steel shackles are polished to a high luster and are stamped with the screw pin diameter.Large open shackles have a similar shape to \”D\” shackles but are proportionally wider for their length. Shackle pin (mm)5 mm Shackle pin (in)3/16 in Weight (g)25 g Weight (oz)0.88 oz Maximum working load (kg)350 kg Maximum working load (lb)770 lb Breaking load (kg)1000 kg Breaking load (lb)2200 lb