All manufacturers are required to
assign a class rating to receiver hitches
and accessories.
The manufacturer determines the
class of the device - not the customer.
If someone wants to buy a
Class 4 or 5 rated aftermarket
device from this manufacturer
it is available here for 2.5 inch
receiver hitches:
@
https://www.hitchrider.com/hitch-vise-fit-guide-25.htm
Jim