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

METOWARE Trailer Tongue Coupler Lock is a compact, heavy-duty hitch pin lock designed to secure 1/4" diameter trailer couplers with a 3-1/2" span, featuring a push-to-lock pin, tubular key cylinder, and waterproof cap.

Whether you tow a small utility trailer, ATV carrier, or light equipment trailer, keeping the coupler locked is the easiest way to deter theft and prevent accidental disengagement. This METOWARE lock combines a solid steel pin with a reinforced tubular lock head and weatherproofing to hold up on long trips and in wet conditions. It’s small enough to carry but robust enough for regular use.

How does this lock secure my trailer during transport?

The 1/4" diameter pin slides through the coupler latch to block the hitch from opening while towing. The tubular lock head locks the pin in place, stopping the pin from being pulled or pushed out without the key. Together they provide a physical barrier against casual theft and unintentional release.

• 1/4" hardened steel pin for strength under load
• 3-1/2" effective span fits common coupler latch widths
• Reinforced tubular core resists prying and tampering

Is the lock easy to use for quick hookups and storage?

Yes — the push-to-lock design lets you set the pin without reaching for the key, saving time at the hitch. To remove the pin, insert the tubular key and rotate slightly; the pin pops out for immediate release. A spare tubular key is included so you’ll have a backup on hand.

• Push-to-lock action for fast, one-handed engagement
• Two tubular keys included (primary + spare)
• Simple pull-out release after a short key turn

Will this lock hold up in rain, mud, and salt spray?

METOWARE added multiple rust-resistant features to keep the lock working despite exposure to moisture and road grime. An electrophoretic paint coating protects the metal surfaces, while a water-tight rubber cap seals the keyhole. These elements reduce corrosion and keep the mechanism operating smoothly season after season.

• Electrophoretic anti-corrosion coating on metal parts
• Watertight rubber cap protects the keyway from water and dirt
• Durable construction suited for wet and snowy conditions

What size trailers and couplers is this best for?

This METOWARE coupler lock is designed for smaller trailers and light towing applications that accept a 1/4" hitch safety pin with up to a 3-1/2" span. It’s ideal for utility trailers, small boat dollies, ATV/UTV trailers, and other light-duty haulers. Measure your coupler latch before ordering to ensure fit.

• Fits coupler latch holes sized for 1/4" pins
• 3-1/2" span accommodates most small trailer latch widths
• Portable size works for on-the-road storage in pockets or gloveboxes

Who this is for: The METOWARE Trailer Tongue Coupler Lock is a practical, no-fuss security solution for owners of small to medium utility trailers, recreational trailers, and equipment carriers who want a compact, weather-resistant locking pin. If you frequently hitch and unhitch on the go, need a lock that resists corrosion, and prefer the convenience of push-to-lock operation with a tubular key backup, this lock is built for that use. It’s not intended as a replacement for high-security heavy haul locking systems on very large or commercial trailers; instead it offers reliable theft deterrence and secure coupling for everyday light towing needs.