COOHAME Trailer Hitch Lock — Adjustable Coupler Lock for 1-7/8"/2"/2-5/16" Balls, Heavy-Duty Steel, Red

This lock is built to keep boat trailers, campers, RVs and utility trailers attached only to authorized vehicles. The bright red finish signals deterrence while the keyed core and solid-steel construction resist common theft attempts, corrosion and wear. It’s designed to be sized by the user for a snug fit and installed quickly without tools.

How does this lock stop unauthorized towing?

The COOHAME coupler lock physically blocks the trailer ball and coupler from disconnecting, so a thief cannot hitch up and tow away. The keyed single-turn mechanism keeps the adjustable internal components locked in place until you unlock it. Its visible red color also works as a visual deterrent to opportunistic thieves.

• Keyed lock core prevents accidental opening and unauthorized removal.
• Adjustable internal sizing clamps to 1-7/8", 2", and 2-5/16" balls for a secure fit.
• Bright red finish increases visibility to deter theft attempts.

Will it resist cutting, prying and the elements?

The lock combines heavy-duty steel with corrosion-resistant aluminum components to balance strength and longevity. While no lock is completely impervious to determined thieves with heavy tools, this unit raises the effort and time required to defeat the hitch, which is critical in preventing opportunistic theft. The materials and finish help limit rust and maintain performance in wet or coastal environments.

• Hardened steel parts resist saws and cutters longer than thinner metal alternatives.
• Aluminum and protective coatings reduce corrosion and extend service life.
• Robust key mechanism reduces vulnerability to simple prying attacks.

How easy is it to fit and use on different trailers?

Installation is tool-free and takes only seconds: drop the lock into the coupler area, turn the key to expand or contract the internal latch, then remove the key and lock in place. The adjustable design accommodates the most common ball sizes so a single lock covers multiple trailers you might own. Its straightforward operation is convenient for busy users who need reliable protection without fuss.

• Adjustable by turning the key to match ball size—no separate parts required.
• Quick attach/detach saves time when loading or storing trailers.
• Works with boat trailers, RVs, campers, utility trailers and more.

What practical features should I know before buying?

The lock is sold as a single pack in a high-visibility red finish, with one keyed set included. Its compact form makes it easy to store when not in use, and the keyed single-turn action is designed to be intuitive while preventing accidental half-turn openings. Consider keeping a spare key or documenting the key code in a secure place.

• One-pack includes lock body and keys—store spare key separately.
• Compact, portable design fits in a toolbox, glove compartment or trailer storage box.
• Red color improves public visibility and theft deterrence at a glance.

Who is this for: COOHAME’s adjustable trailer hitch coupler lock is suited to boat owners, RV travelers, contractors and anyone who frequently parks trailers in public or unattended areas. It’s a practical choice when you need a visible, no‑fuss anti-theft solution that fits the three most common ball-hitch sizes and endures outdoor conditions.