What Am I? Latching

Welcome back to another episode of DT’s infamous What Am I? — the quiz where you get to show your esoteric car knowledge and everybody is a winner.  Wait…that’s not right, this game is like competitive Olympic curling, there can ONLY be one winner and she is a smokin Russian…no that’s not right either…ANYWAY, solve this puzzle. What Am I?

What am I? Comments below.