Downhaul crank as a suitable extension with pin system. This crank also works as a downhaul grip, so you get two rigging tools at the same time.
Makes it easy to pull the downhaul correctly. If you use this crank, you don't have to sit down and stretch your back when you pull the downhaul. It is actually so easy to pull the sail down that without thinking about it, you pull the sail down too much.
A must-have product for those who sail with slightly larger sails!