Fitment:Insert sleeve mount adapter reduces standard 2-1/2" square receiver hitch to accept 2" to insert. | Material:CNC Billet Aluminum,surface grinding,powder coated black,resistance to rust and corrosion. | Feature:For standard 2-1/2'' square receivers,fits snugly inside the receiver. | Higher friction:Different from normal models,special shape design gives the adapter higher friction and prevent wobbling.The special lip made it difficult to slip into hitch tube. | Package Includes:1 x Insert sleeve mount adapter.