What we have here is an ABR-1 Tune-O-Matic bridge mounted on a Rickenbacker-compatible baseplate.
This is what you get: First, it's a chrome-plated, ABR-1 TOM bridge -- with solid brass saddles that you can notch for your preferred string spacing and a mellow sound. Second, it's mounted on a Rick-compatible baseplate. What does that mean? It means that the baseplate is drilled to drop right into the holes for your existing bridge, but it also has the two mounting studs for the bridge permanently fixed into the baseplate. And what does that mean? It means that you don't have to drill any holes into your guitar to install a TOM bridge. Considerate, eh? And yes, the bridge is angled for perfect positioning and intonation.
NB: This bridge is a drop-in replacement for a Rickenbacker bridge. You get the bridge, the baseplate, the thumbscrews, and the mounting screws. You get it all. What else could you ask for?