Has anyone come across anything like this before? If so, what's it for?
Screwgate is rated at 25kn, the only other mark says '6-8' on the triangular attachment, the only other markings is the serial thing.
Here are two pictures of the item:
http://i16.photobucket.com/albums/b5/andrew2332/1.jpg
http://i16.photobucket.com/albums/b5/andrew2332/2.jpg
This has been sitting on the side for a while, I've no idea where it's come from and I've been meaning to ask the hive mind of UKC for a while!