Quasar Science Ossium Rotator

The Rotator is the Ossium system's answer to a grip head, shrunk to the scale of a tube light. It screws directly to the Ossium Rail, the Slider or the Battery Plate, and accepts either 5/8 inch or 3/8 inch rod, so a fixture can be angled off a baby pin, a stand arm or a piece of speed rail without hunting for an adapter.

Its more useful trick is stacking: screw two Rotators back to back and you get two swivel points on two separate axes, which is how you get a tube pointing somewhere a single pivot cannot reach. It also handles the battery side of a rig, letting a V-mount or Gold-mount pack hang off a rod rather than swinging from the fixture.