i believe you will need to rivet them in place,they also sell tiny screws that have self-tapping ends,that all you need to do is pre-drill the hole,then screw them in place.ive used them before for some luxury sport trim i installed on a el conversion a couple years back,i cant recall where my lil sis found them? but i recently found them in a hardware store not to long ago.the trim clips you can order from opgi,dixie,etc.