In article ,
"(PeteCresswell)" wrote:

I'm trying to buy a few more of these things.

I guess it's some sort of shackle... but don't have a clue beyond
that.

Can anybody put a name on it?

http://www.flickr.com/photos/48262653@N00/488580505/

or

http://tinyurl.com/229vlr

Sure looks like a "trigger safety shackle" used to connect an optimist
mainsheet to the boom. optistuff.com or www.apsltd.com should have them.

Jack