The SuperVisor Kickstarter took a familiar concept, and found a particular aspect to improve. The SuperVizor is pitched as an auto-escape tool and was designed by a Avi Goldstein, a NY-City Paramedic who has cut his teeth with several Kickstarter projects now.
The hook has a molded nylon finger grip for the index and middle fingers and a little tab on the outside for the ring finger to lay on for extra stability and leverage The back of the hook has crenelations for thumb positioning and grip. The blade was wide enough to take bunched seatbelt webbing without an issue, but not so wide as to be a safety worry.
I have a Zulu Nylon Gear MOLLE visor so if I wanted I could (and have in past) mounted a rescue hook directly to the MOLLE, but in this instance, and in most people's PALS/MOLLEless car interiors, you can securely affix the SuperVizor to the sun visor and have this tool at your fingertips to extract yourself, and your loved ones, in the event of a crash or off-the-road misadventure. The sheath has a small retention tab to hold the hook in place, and secures very firmly to my visor, I've not had any concern wit hit falling out, or shifting in my peripheral vision, even over some pretty poor roads.
There is a current Kickstarter going on, for the same set up, but with an expanded range of colours, so if you're keen, look them up here.