This is the clip with the hook that (tries to) keep the floor mat from sliding forward in 1994-2004 Mustangs. Over time, the hook pulls on the carpet and tears it. When the carpet is ripped, the hook can go missing. If your Floor Mat Hold Down Retainer Hook Clip is missing, this is the OEM Ford Replacement Floor Mat Hold Down Retainer Hook (P/N 1W6Z-76130A83-AA)