BOYISEN Trailer Hitch Pin Lock 5/8 in - Weatherproof Anti-Theft

In this review the BOYISEN Trailer Hitch Pin Lock is presented as a straightforward, heavy-duty option for owners who tow trailers, boats or RVs and need reliable theft deterrence. The bottom line is that this is a simple, well-built hitch lock pin that focuses on solid mechanical security rather than electronics or complicated locks. It is best for anyone with a Class III/IV/V 2x2 in or 2.5x2.5 in receiver who wants a weather resistant, snug-fitting pin that prevents rattling and gives peace of mind during storage or towing.

Key Features

• One-piece forged construction: The single-piece high-strength steel design removes penetration points and improves resistance to forced entry.
• 5/8 in pin diameter: Sized to fit standard 5/8 in receiver holes for Class III/IV/V 2x2 in and 2.5x2.5 in hitches for broad compatibility.
• 3.5 in usable pin length: Provides enough engagement with most ball mounts and hitch receivers while keeping overall length compact.
• Weather resistant finish: Durable powder coating and a watertight dust cap protect the internal lock from corrosion and moisture.
• Rattle prevention: Supplied with eight rubber O-rings to ensure a snug fit that cuts down on noise while towing.
• Four keys included: Two locks come with four keys so you can stow spares for emergencies or share a key with another driver.

Who It's For

This hitch pin lock is best for pickup and SUV owners who frequently tow trailers, boat trailers or utility trailers and need a durable mechanical lock to secure the hitch and ball mount. It suits users who prefer a simple, proven solution that requires no batteries or electronics and who value corrosion resistance for year-round use.

Those who need an integrated cable lock, electronic tracking, or a very long pin for nonstandard receivers should look elsewhere. Also verify receiver hole size and pin length before buying, since this product is specifically for a 5/8 in hole and offers 3.5 in usable pin length.

Pros & Cons

Pros

• Solid, one-piece forged steel construction provides straightforward anti-theft strength.
• Weatherproof design with dust cap and powder coating helps prevent internal corrosion.
• Includes eight O-rings and precise cutting to reduce rattling during towing.
• Two locks with four keys offer immediate key spares and convenience for multiple drivers.

Cons

• Limited to receivers with a 5/8 in hole and 3.5 in usable pin length, so it may not fit every setup.
• No electronic or cable features for added versatility beyond the mechanical lock.

Specifications

Brand	BOYISEN
Pin diameter	5/8 in
Usable pin length	3.5 in
Compatibility	Class III/IV/V 2x2 in and 2.5x2.5 in hitch receivers
Load test	Practical test up to 20,000 lb
Included items	Two hitch locks, four keys, eight rubber O-rings
Weather protection	Powder coating and watertight dust cap

Our Verdict

The BOYISEN Trailer Hitch Pin Lock is a practical, cost-effective choice for owners who want a robust mechanical way to secure a ball mount or trailer. It delivers durable construction, weather resistance and effective rattle prevention, making it good value for anyone with a compatible 5/8 in receiver who prefers a maintenance-free, non-electronic solution.

Frequently Asked Questions

Will this fit my hitch receiver?
It fits receivers with a 5/8 in hole and is intended for Class III/IV/V 2x2 in and 2.5x2.5 in hitches; measure your hole and required pin length to confirm fit.

Does it resist rust and water?
Yes, the internal lock is protected by a watertight dust cap and the body has a durable powder coating for corrosion resistance.

Are spare keys provided?
Yes, the package includes two locks with four keys so you have spares for emergencies or multiple users.