The OP may just be repeating what the dealer who sold him the hitch told him. When I was buying my trailer this spring, the dealer told me they give and install a WD hitch with every trailer sold if you don't already have your own. I asked what hitch they installed and was told "an Equal-I-Zer." Fortunately, I asked to see the box the hitch comes in. It was actually a Fastway E2 hitch, which is a weaker Equal-I-Zer knock off. I made it part of the deal to install a Reese Strait-Line Dual Cam hitch.