Versatile Adjustable Design: This black towing coupler fits 1 7/8 inch, 2 inch, and 2 5/16 inch couplers with a ratcheting adjustable mechanism. Heavy Duty Metal Build: Constructed from strong metal and premium aluminum alloy, this trailer security device delivers excellent anti theft and anti cut qualities with an advanced locking mechanism to resist prying. Improved Features: The unique towing mechanism secures the connector, blocking unauthorized removal and reducing theft risks. High Visibility Security: Featuring bold black coating and bright colors for easy spotting, this coupler uses modern anti theft technology to discourage potential thieves in vulnerable locations. Simple Setup & Usage: fast installation on ball mount attachments, this towing coupler comes with two keys and provides smooth functionality while safeguarding your cargo during transit.