Chinook Downhaul 3-roller power hook pulley. If the tack of your sail does not have a pulley system and has a grommet, the hook pulley makes rigging your sail faster than ever. Keep the pulley connected to your downhaul line permanently and just hook the clip to the grommet and get on the water!.
Comes in various colors.
If you are riding larger race sails consider the 4-pulley hook.