A fifi style hook purposely designed for remote haul releasing while solo climbing.
A full-size upper carabiner hole allows the tagline side carabiner to be directly clipped into the haul hook, no small cord or quicklinks required. A jog in the hook arm adds a touch more security to the hook in the case of a bumped bag, but still pulls cleanly from above (see instructions link below for performance with different anchor configurations).
This hook is perfect for top rope solo fixed line rehearsal on a multipitch route. Bring a tiny tagline and haul your kit behind you, without needing a partner to release the bag.