This Universal Ball Star Plate is designed to accept 150mm Sachtler or Cartoni 150mm Ball-Claw fluid heads. This adapter converts a standard Mitchell Top Tripod or Hi Hat without tools. Not designed for Manfrotto Products.
It also fits All of the equipment carts sold at Filmtools that have a Mitchell mounting plate, including the Magliner and Filmtools Carts, the Backstage TR-04 Aluminum Camera Cart and the Yaeger Mitchell Plates.
The lower photo illustrates how the plate fits onto a Mitchell Hi Hat.