TOWBUBING Trailer Hitch Lock Kit for 2-5/16" Tongue — Heavy‑Duty Coupler & Tongue Locks, Powder‑Coated Steel

TOWBUBING's Trailer Hitch Lock Kit secures 2-5/16" A-frame couplers with a matching tongue lock to deter theft and keep trailers immobilized when parked.

Protecting a trailer starts at the connection point. This kit combines a solid coupler lock built for select 50×50 and 50×60mm couplers with a tongue lock sized for 2-5/16" hitches. Constructed from thick steel with a weather-resistant powder coat and a tamper-resistant cylinder, the set is designed for outdoor storage on boats, RVs, utility trailers, and equipment haulers. It’s a two-piece defense that emphasizes a tight fit and quick installation so you can secure your trailer in seconds without tools.

How does this kit stop common trailer theft attempts?

The design focuses on resisting cutting, prying, and drilling with hardened components and protected locking mechanisms. The coupler lock surrounds the latch area to prevent leverage, while the tongue lock immobilizes the hitch ball, making towing impossible without removing both pieces.

• Thick steel construction prevents saw-through attacks.
• Tamper-proof cylinder reduces drilling and picking success.
• Powder-coated finish resists rust that could weaken parts.
• Two-lock approach blocks both hitching and unlatching routes.

Will this fit my trailer's coupler and tongue?

Fit matters: this kit is made for fixed 50×50 or 50×60mm couplers and standard 2-5/16" A-frame trailer tongues. It will not fit adjustable couplers, Bulldog-style couplers, couplers with built-in locks, 50mm (single metric), ring/pintle connections, or 1-7/8" tongues. Measure before purchase to ensure a snug, wobble-free installation.

• Compatible with select 50×50 and 50×60mm couplers only.
• Designed for 2-5/16" A-frame trailer tongues (standard ball size).
• Not suitable for adjustable, lock-equipped, or pintle couplers.
• Confirm coupler dimensions for a secure fit.

How easy is it to install and store when not in use?

Installation is tool-free and intended to be fast: you can secure or remove each piece in about 10 seconds. The compact components store easily in a vehicle compartment or under a seat, and the simple design avoids fiddly parts while still delivering robust protection.

• Quick-install, no tools required—set up in roughly 10 seconds.
• Compact footprint for straightforward onboard storage.
• Smooth installation reduces wear on the trailer latch and tongue.
• Bright finish makes the locks easy to locate when needed.

How does the finish hold up outdoors and in salty conditions?

The kit’s heavy-duty powder coat shields steel surfaces from moisture, sunlight, and road salt to slow corrosion and preserve structural integrity. Combined with solid internal construction, this extends usable life and keeps locking ability consistent after repeated outdoor exposure.

• Powder-coated surface resists rain, UV, and salt spray.
• Corrosion protection maintains strength over time.
• Durable finish reduces maintenance and prevents flaking.
• Suitable for coastal and trailer-park environments.

Who is this for: The TOWBUBING Trailer Hitch Lock Kit is suited for boat owners, RVers, landscaping and equipment contractors, and anyone who parks trailers in shared, public, or unattended locations and needs a fast, heavy-duty theft-deterrent. It’s best for trailers with fixed 50×50 or 50×60mm couplers and a 2-5/16" tongue—buyers requiring compatibility with other coupler types should verify measurements or seek a model matched to their hardware. If you want reliable, low-effort protection that resists common tampering techniques while standing up to outdoor conditions, this kit offers a practical, two-piece solution.