RETRUE Trailer Tongue Hitch Coupler Lock — 1/4" Pin, 3/4" Span, Black, Zinc-Alloy Weather-Resistant

RETRUE Trailer Tongue Hitch Coupler Lock secures latch-type couplers with a 1/4-inch diameter pin and up to a 3/4-inch span to deter theft and prevent accidental uncoupling.

Keep your trailer, utility cart, or boat tongue protected with a compact, padlock-style coupler lock that combines corrosion-resistant materials and simple operation. Built from zinc-alloy and plated steel, this RETRUE lock is finished in black and designed to fit most common latch couplers. It comes with two keys and a straightforward 1/4-turn key action for fast locking and unlocking—ideal for owners who need reliable security without extra bulk.

How does this lock attach to my trailer tongue?

The RETRUE lock inserts through the coupler latch pin hole and uses a 1/4-inch diameter locking pin to secure the latch in place. Its padlock-inspired body keeps the pin captive so the coupler cannot be opened until the key is used. Installation is a quick one-person task that doesn’t require tools.

• Fits latch-style couplers with a span up to 3/4 inch
• Insert the 1/4" pin through the latch, align, then turn the key to lock
• 1/4-turn key action; spin key 5–7 times to open or close

What materials and finishes protect the lock outdoors?

RETRUE uses a high-strength zinc alloy for the lock body and zinc-plated steel for the coupler pin to resist wear and rust in outdoor environments. The exterior receives a black painted finish that helps shield the lock from the elements and reduces visible corrosion over time. This combination balances durability with a low-profile look on your trailer tongue.

• Zinc-alloy housing for impact resistance
• Zinc-plated steel pin to reduce corrosion
• Black painted finish for added weather protection and discreet appearance

Will this lock stop opportunistic thieves?

While no lock is entirely theft-proof, the RETRUE coupler lock adds a strong, visible obstacle that discourages casual tampering and quick grab thefts. Its padlock-style construction and solid pin make forcing the coupler more difficult and time-consuming. For higher-risk situations, consider pairing it with additional security measures like wheel locks or trailer alarms.

• Solid pin and sturdy body increase tamper resistance
• Visible deterrent: black padlock-style appearance
• Best used as part of layered security (locks, chains, alarms)

How easy is it to use day-to-day?

Designed for convenience, the RETRUE hitch lock uses a simple 1/4-turn activation—spin the flat key about 5–7 times to lock or unlock. The included two keys reduce the risk of being stranded without access. No extra tools are required, making it fast to secure the trailer whenever you hitch or unhitch.

• One-person install and removal; no tools needed
• Two keys included for backup convenience
• Quick 1/4-turn locking action saves time at the hitch

Who is this for: The RETRUE Trailer Tongue Hitch Coupler Lock is made for trailer owners, landscapers, contractors, and recreational users who want a compact, easy-to-use locking solution for latch-type couplers up to 3/4" span. It suits people who need a reliable deterrent and weather-resistant construction without adding heavy or bulky hardware to their trailer tongue.