Master Lock 378DAT Adjustable Universal Coupler Lock for 2-5/16 Inch Trailer Couplers

The Master Lock 378DAT is an adjustable universal coupler lock designed to protect trailers, RVs, boats, and other towable equipment from theft. This heavy-duty security device fits standard 2-5/16 inch trailer couplers and features a hitch ball and clamp-type locking mechanism that provides robust theft deterrence when your trailer is parked or in storage.

Key Features:

• Fits 2-5/16 inch trailer couplers for universal compatibility
• Adjustable design accommodates various coupler sizes and styles
• Advanced locking mechanism with hardened steel construction
• Hitch ball and clamp-type system for secure attachment
• Bright yellow finish provides high visibility as a theft deterrent
• Weather-resistant design for outdoor use

This coupler lock installs quickly over the trailer coupler, preventing unauthorized hitching and towing. The adjustable design ensures a snug fit on different coupler configurations, while the advanced locking cylinder provides pick resistance and security. An essential accessory for protecting your investment when your trailer is unattended.