★【2-1/2" to 2" Hitch Receiver Adapter】Convert 2-1/2" Class V hitch receiver into 2" Class III&IV receiver. Enable a 2.5" receiver to fit popular 2" hitch accessories such as bike rack and cargo carriers,★【Improved Opening】Unlike ordinary adapter slip overly into the tube, there is Unique Welded Lip on the opening, Solve The Problem Of Sliding Into The Receiver Tube Too Far.