Crafted from durable stainless steel, these shackles are polished to a sleek finish and clearly marked with the 8mm screw pin diameter. "D" shackles are the preferred choice for most attachment points, especially those that are perfectly aligned. Part No. 2115 8mm "D" Shackle has a maximum working load of 1380 kg (3040 lb) with a shackle pin diameter of 8 mm (5/16 in).