Of course I did NOT know that word. He responded, with a pun, "I'm APPAWLED that you don't know that word!"
According to the Merriam Websster Online Dictionary, the pawl is: "a pivoted curved bar or lever whose free end engages with the teeth of a cogwheel or ratchet so that the wheel or ratchet can only turn one way."
I was wondering why the strap locks could not be recycled. See this method from YouTube: