Love it or hate it Harbor Freight is awesome for odds and ends. I love buying hardware and cheap random things from there. I stay away from the power tools. They are cheaply made in China, but that is the appeal for many. Sometimes it is cheaper to buy a tool from Harbor Freight than it is to rent a tool from The Home Depot. While in Harbor Freight we came across this package, how many wheels do you count?
I have a set of these bad boys holding up my cargo box. I can confirm that they do indeed have a double pulley setup. Semantics aside, they do work well for my application.