Grade 316 Stainless steel - BRIDCO Forged Bow Shackle.
With a larger "O" shape to the loop, this shackle can take loads from many directions without developing as much side load. However, the larger shape to the loop does reduce its overall strength.
Also referred to as an anchor shackle. Stock sizes 3mm, 8mm, 10mm and 12mm.
Other sizes available on request - see attached PDF for full range and specifications.