Honeywell VX89A032RAMBALL is a mounting ball for attaching equipment to a vehicle. Its D-size 2.25-inch ball provides the mounting interface, while the square base is intended to be fixed to the vehicle.
The base measures 4.75 inches square. This distinguishes the part from Honeywell’s other D-size balls, which use round or clamp-style bases. It is listed as a vehicle mounting component in Honeywell’s Thor VM accessory guide.
Use this part where a vehicle-mounted setup calls for this ball size and square-base format.