Marty a "tandem" or "tandem rig" refers to a diver/bait combo. The diver I use is a Magnum Hot-N-Tot painted black. The bait is usually a whole sandshrimp preceded by two beads and a Spin-N-Glo at the end of a five foot leader attached to the diver.

The rattling beads are made by Northland Tackle a company specializing in walleye gear. Each bead (7mm) is hollow and contains tiny steel shot that make a low clicking sound when you shake them.

Strike Zone, I got them from Cabela's. But Bass Pro has them also I think.