Amazon.com: Kohree Trailer Hitch Lock 5/8 Inch, Hitch Pin Lock for Class III IV 2 Inches and 2-1/2 Inches Receiver, Locking Hitch Pin Tow Hitch Lock with Key, Safety Clip & Anti
Zone Tech Trailer Hitch Receiver Lock Anti-theft 5/8" Pin For Class Iii Iv 2" & 2-1/2" Receiver With Rubber Cap - Receiver-for Tow Trailer, Car, Boat : Target