what makes a class 3 hitch a class 3

[KDracing]

i have a 2" reciever on my truck with what i thought was a class 3 ball mount, the ball mount has a 2" drop with a 2"ball however has a hollow shank. the other day i was helping my friend hook up his trailer and noticed his had a solid shank and he insisted his was class 3 also. which one is class three and i would guess there has to be different ratings for each of them.

thanks
kevin

[APT]

The class rating has nothing to do with the ball mount. All 2" receviers are at least Class 3. The mount will have its own rating by weight, not class. Your "tow limit" is the least of the OEM tow rating, recevier, ball mount, ball, etc. Solid vs. hollow means little.