Fastway Trailer Products 4 in. Fixed Drop Self Locking Ball Mount 2 Inch, DT-LBM9400 4in. Drop Or 3in. Rise; For Use With 1 1/4in. Ball Shank; Fits All Common 2in. X 2in. Receiver Hitches; Simple Key Activated Locking System; No Need For Additional Locking Devices; Unique Spring Loaded Stainless Steel Anti Rattle System; Machined From One Piece Billet Aluminum Fastway Trailer Products Fastway Trailer Products 4 Inch Fixed Drop Self Locking Ball Mount (Polished) - DT-LBM9400 DT-LBM9400 Trailer Hitch Ball Moun