Forged stainless steel shackles are polished to a high luster and are stamped with the screw pin diameter. Twist shackles are forged with a 90-degree twist so the two attachment points can be perpendicular without torquing. 5mm Specs:Shackle pin Ø (mm)8 mmWeight (g)22 gA (mm)37 mmB (mm)10 mmMaximum working load (kg)540 kgBreaking load (kg)1080 kg 6mm Specs: Shackle pin Ø (mm)6 mm Weight (g)32g A (mm)29 mm B (mm)12 mm Maximum working load (kg)750 kg Breaking load (kg)1500 kg 8mm Specs: Shackle pin Ø (mm)8 mm Weight (g)52g A (mm)41 mm B (mm)17 mm Maximum working load (kg)1380 kg Breaking load (kg)2760 kg 10mm Specs: Shackle pin Ø (mm)10 mm Weight (g)140.5 g A (mm)48 mm B (mm)19 mm Maximum working load (kg)2210 kg Breaking load (kg)4420 kg