These grilles are simple and attractive. The plastic base goes under the speaker, then the metal grille snaps in after the screws are installed.There is a shallow recess in the base that the speaker fits into. No logo--I think they would work with most 5-1/4 in speakers, except ones with a "pincushion" basket or a really tall tweeter. The base is 6-1/2 inches across, so make sure you have room. I put a few spots of dum-dum (auto body sealer) in the slot where the metal grille fits just to make sure it didn't buzz.