Don White wrote:

My mast head has two shackles...
The larger is attached to the main halyard, and the smaller one attached
to a block that the topping lift is fed through.
[IMG]http://img.photobucket.com/albums/v252/whited/Hpim0114.jpg

note: Since above picture, I've installed a 3rd shackle...this time on
the forward edge of the masthead casting to help in raising singlehanded.