To remove the nut from a customers hitch ball?? To change ball sizes to match the U-Haul trailer? Just guessing.
Three feet long for enough leverage for any rusty nut, a pipe wrench to fit any size, rounded off or not, also will hold the ball to keep it from turning. So, one for the ball, one for the nut, two wrenches for every U-Haul location, that's enough for a special order with the company logo, which also reduces (not eliminates) theft.
-jp