Looks like someone other than myself has a lock on there OBD port
If you're referencing the long black "key", Diesel and DEF locking caps.
Purple=RV
Black Tile Pro
Handcuff key, I carry a set of cuffs in my go bag
DEF/Diesel cap key
The little dongle is for a boat floaty
Brinks key was for the 5th wheel hitch lock, but I've seen picked up a nice selection of keyed alike PACLOCK's. The old brass Brinks locks were great, the new ones are chicom garbage.