This 2-piece trim set accents the top of the underside of your hood.  This is the area that sits above you wiper cowl when the hood is closed.  the picture shows a full underhood mirror kit, but that is not what is for sale here.  The pieces for sale here are indicated in the photo.  These 2 pieces stick on with pre-applied 3M automotive doule-sided tape.  Clean the area, and stick into place.