Padeyes are great for mounting pulleys and are also used as attachment points wherever they are required.
Harken offers a range of stainless steel padeyes. The diamond-shaped padeyes, 668 and 669, are 316 stainless and their shape allows them to be mounted very close together.
627, 629 and 648 padeyes are 17-4PH stainless.
For maximum strength, always align the padeye bails to the load.