METOWARE Trailer Tongue Coupler Lock — 1/4" Pin, 3-1/2" Span, Tubular Key, Weatherproof

METOWARE Trailer Tongue Coupler Lock is a compact, heavy-duty 1/4" diameter, 3-1/2" span coupler pin with a rotating lock head and tubular keys, built to secure your trailer hitch on the road.

This lock was created to keep your trailer safely hitched or to immobilize the coupler when parked. It combines a push-to-lock pin mechanism, a 361° rotating lock head with a waterproof rubber cap, and a reinforced tubular core for improved resistance against tampering. The low-profile design is pocketable for convenience, while corrosion-resistant finishes and protective caps help the lock tolerate wet, snowy, and salty conditions without seizing.

How does the push-to-lock pin make daily use easier?

The push-to-lock feature lets you secure the coupler quickly without fumbling for the key: push the pin into place and it locks automatically. To remove it, insert the tubular key and turn slightly; the pin will release and pop out for fast detachment.

• One-handed operation for fast hitching and unhitching
• No key needed to lock — ideal when your hands are full
• Simple key turn to release, reducing setup time at stops

What makes this lock durable against weather and wear?

The METOWARE lock uses electrophoretic paint on the steel body and a watertight rubber cap over the keyway to keep moisture and grit out. These protections reduce rust and prevent the keyhole from clogging, so the mechanism stays functional over long-term exposure to the elements.

• Electrophoretic coating to resist corrosion
• Watertight rubber cap protects the keyway from water and debris
• Heavy-duty steel construction for long-lasting strength

Is the tubular key and lock core more secure than standard locks?

Yes — the lock uses a reinforced zinc-alloy tubular core paired with stronger tubular keys, which improves resistance to simple picking methods compared to basic pin-and-tumbler designs. The package also includes an extra key for backup, helping you avoid lockouts.

• Reinforced tubular lock core for increased tamper resistance
• Two tubular keys included — one for daily use, one spare
• Compact, low-profile head that reduces leverage points for thieves

Will this lock fit my trailer tongue and how portable is it?

The lock pin measures 1/4" in diameter with an effective 3-1/2" span, matching common coupler designs and offering a flexible fit for most standard trailer tongues. Its compact size makes it easy to carry in a pocket, bag, or vehicle glove box so you always have it when needed.

• 1/4" diameter pin fits many trailer couplers and tongue holes
• 3-1/2" span for clear engagement across typical hitch assemblies

Who is this for: The METOWARE Trailer Tongue Coupler Lock is intended for trailer owners, weekend boaters, landscapers, and contractors who need a simple, rugged way to secure a trailer coupler. It's especially useful for those who value quick, one-handed locking, weather resistance for long trips, and a compact lock that’s easy to stow. It’s not a substitute for high-security systems where maximum resistance to advanced attacks is required, but it provides strong, everyday protection for most towing situations.