CZC AUTO Trailer Tongue Coupler Lock 1/4" Dia, 7/8" Span — Keyed-Alike Pack of 2, Corrosion-Resistant

The CZC AUTO Trailer Tongue Coupler Lock is a 1/4" diameter, 7/8" span keyed-alike locking pin designed to secure latch-style trailer couplers and resist corrosion.

Built for boat trailers, utility trailers, RVs and small towing setups, this compact coupler lock provides a straightforward way to block unauthorized hitching. The package includes two keyed-alike locks so both pins open with the same key, and each pin features a watertight rubber cap to keep out moisture and debris. Constructed from high-strength steel with a black electrophoretic finish and a zinc-alloy tubular core, the design balances physical durability with easy operation.

How does this coupler lock fit latch-style trailer couplers?

The lock is sized for latch-type couplers that accept a 1/4" diameter pin and require an effective span of roughly 7/8" to retain the latch. Before ordering, measure the coupler’s pin hole and the space needed to secure the latch to ensure compatibility. Head length and bottom length are close to 0.97" and 0.95" respectively, which matters for some tight-mouthed couplers.

• Pin diameter: 1/4" (0.25 inches)
• Effective span/length: 7/8" (approximate)
• Head length ~0.97", bottom length ~0.95" — verify with your coupler
• Watertight rubber cap protects the pin opening from elements

How secure and weather-resistant is the CZC AUTO lock?

The pin is made from high-strength steel and finished with electrophoretic black coating to help resist rust and wear. The locking core uses a zinc-alloy tubular design and the package includes solid round keys to make forced access more difficult. While no lock is invulnerable, this unit is engineered to deter casual theft and to stand up to rain, snow and road dirt.

• High-strength steel pin for physical resistance
• Electrophoretic paint reduces corrosion over time
• Zinc-alloy tubular lock core increases tamper resistance
• Rubber cap keeps water, ice and grit out of the lock hole

How easy is it to lock, unlock and store these pins?

Operation is designed to be quick and simple: a quarter-turn of the key releases the pin, which then pops up automatically for removal. Re-insert the pin and turn the key to lock it in place. Because the two locks in the pack are keyed alike, you only need one key for both pins, simplifying daily use.

• Simple 1/4-turn key operation to open or lock
• Pin pops up automatically for quick removal
• Two keyed-alike locks included — single key convenience
• Compact size stores easily in glove box or toolbox

What customer support and warranty does CZC AUTO provide?

CZC AUTO backs this coupler lock with a 30-day money-back option and a 12-month warranty covering quality-related problems. If you encounter installation or function issues, the brand commits to responding and resolving matters promptly. Keep your purchase details handy when contacting support for the fastest service.

• 30-day money-back guarantee for any reason
• 12-month warranty for quality-related defects
• Customer support response within 24 hours for assistance
• Contact CZC AUTO with purchase information for warranty service

Who is this for? This CZC AUTO coupler lock is ideal for trailer owners who need a compact, weather-resistant locking pin for latch-style couplers—owners of small boats, ATVs, utility trailers, and campers who want a simple keyed-alike solution. It’s best for users who will verify the 1/4" pin diameter and roughly 7/8" span against their coupler measurements before purchase; if your coupler dimensions match, this lock offers an affordable, easy-to-use layer of towing security with manufacturer support.