Product details
FCLDZZ zinc-alloy 1/4-inch trailer hitch coupler lock – gold
Fancy a no-nonsense way to stop someone nicking your trailer, boat or caravan? This neat little coupler lock does the job simply and reliably: it locks the tow tongue so no one can hitch up and drive off. Small but sturdy, it’s the sort of bit of kit that genuinely boosts your peace of mind when your gear’s left in a lay-by, marina or on the drive.
why this lock makes sense
Made from zinc alloy for decent strength and corrosion resistance, the lock has a compact footprint (about 4.4 × 4.6 cm / 44 × 46 mm) so it won’t get in the way. The locking pin is 1/4 inch (6.35 mm) in diameter with an effective length of 3/4 inch (≈19 mm), matching the common smaller coupler tongues found on trailers, small boats, garden trailers and similar tow gear. Two flat keys are included, so you’ve always got a spare in the glovebox or with a mate.
typical uses and real-life benefits
- Stops opportunist theft when you’ve left a trailer or boat unattended — far easier than keeping watch all day.
- Handy for caravans, motorhomes and light commercial rigs that use a similar coupler size; perfect for short-term parking and storage.
- No faffing about with complicated fittings — push the pin in, turn the key a few times and you’re sorted. A real bonus on cold, wet mornings.
specifications and fit
Material: zinc alloy. Colour options: gold or black (the black version has an electrophoretic paint coating for extra corrosion protection). Size: approximately 4.4 × 4.6 cm (44 × 46 mm). Locking pin: 1/4-inch (6.35 mm) diameter, effective length 3/4 inch (≈19 mm). Keys: 2 flat keys included. Manufacturer: FCLDZZ. Weight and packaging are modest — designed to be small, portable and out of the way.
things to check before buying
- Measure your coupler tongue to make sure it accepts a 1/4-inch (6.35 mm) pin — this lock won’t fit larger commercial couplers.
- Colours can vary slightly depending on lighting and monitor settings; small manufacturing tolerances may apply.
- If you’re planning heavy-duty or commercial towing, double-check the dimensions first — this is aimed at private trailers, boats, RVs and cars rather than industrial heavy-haul.
Package contents: 1 × trailer hitch coupler lock, 2 × flat keys. Handy, simple and effective — a tidy little deterrent that makes life easier and gives that extra bit of security where it matters.

