A Plate Only kit contains mounting plates only, whereas a complete mounting kit contains anchoring hardware (stays on the bike), AND, mounting plates (that stay on the shield or fairing). Note: Kits with mounting plates are either Trigger Lock kits (no-tool removal) or Quick Change kits (Allen wrench required for removal). Trigger Lock mounting plates WILL NOT go on Quick Change anchoring hardware, and vice versa. (Trigger Lock anchoring hardware is easily identified as it has four 1" polymer bushings, to accept Trigger Lock mounting plates.) If you have Memphis Shades Trigger Lock anchoring hardware already installed on your bike, you can mount a Memphis Fats, Memphis Slim, Memphis Shades Sportshield, or Batwing Fairing on your bike simply by purchasing a shield or fairing, and the applicable Plate Only kit.