UPDATE on stinger socket size question

Buying tools that a person may only use once or twice isn't always cost-effective. Quick trip down to my local RV shop and about 5 minutes later my hitch was adjusted. But I WILL add that even the shop guy tried about three different socket sizes before he got the right one. They used two large-sized box end wrenches and a pneumatic impact wrench to get the nuts off and back on.