This is the wire portion of the old style Hobie 14 main halyard. It's actually designed to use with the single sheeve masthead. If you have replaced your masthead with the dual sheeve version (HC 10602111), then you may use the Comptip Halyard (HC 10657001) even if you have an all alumimum mast.
If you have the single sheeve, you'll need this halyard and a nicopress tool to finish out the eye. Unfortunately, eye does not fit through the sheeve. You may also need a new line.