5th Wheel King Pin Lock with Handle - Heavy Duty Anti Theft

In this review of the BOYISEN 5th Wheel King Pin Lock, the bottom line is simple: it is a practical, heavy duty solution for RV owners and fleet drivers who need a visible, durable kingpin lock that is easy to operate. The single biggest reason to buy is the handle-driven design paired with solid steel construction, which makes locking and unlocking faster and gives a reassuring resistance to casual theft attempts. The reviewer found it particularly useful for frequent hookups where a conventional downward cylinder can be awkward.

Key Features

• Handle design: The outward-turning cylinder and added handle make locking and unlocking faster and more ergonomic than locks that require a downward turn.
• Solid steel construction: Built from heavy duty solid steel rather than cast parts, the lock stands up to weather and adds drill resistance for better long-term security.
• Blossom lock cylinder: The upgraded blossom cylinder reduces vulnerability to simple picking, improving overall theft resistance for trailers and campers.
• High visibility warning tag: A bright warning tag helps prevent accidental attempts to hitch with the lock still installed and increases visibility to deter tampering.
• Keyed unique with spares: Each lock comes with unique keys and two spares so users can keep a backup, reducing the risk of being stranded without access.
• Universal fit: Sized for standard king pins and suitable for RVs, semi trailers, campers and fleet use, making it a versatile anti-theft option.

Who It's For

The BOYISEN kingpin lock is best for RV owners, truck operators and fleet managers who need a rugged, visible anti-theft device that is simple to operate. Its handle and outward cylinder orientation are especially helpful for users who hitch and unhitch regularly or who work in tighter spaces where a downward-turn cylinder is awkward.

Those who need a lightweight or covert lock, or who require electronic tracking features, should look elsewhere; this is a mechanical security device focused on physical strength, visibility and ease of use rather than smart tech integration.

Pros & Cons

Pros

• Easy to operate thanks to the handle and outward-turning cylinder, speeding hookup and removal.
• Heavy duty solid steel build and blossom lock provide solid resistance to casual thieves and weather.
• Comes with two spare keys and unique keying, with a key ID system for replacement if keys are lost.
• Warning tag improves visibility and reduces the chance of leaving the lock on while attempting to hitch.

Cons

• The lock is a mechanical device and will not offer remote or electronic tracking features that some users may want.
• It adds noticeable bulk to the king pin area, which may be undesirable for users seeking a very low-profile solution.

Specifications

Our Verdict

The BOYISEN 5th Wheel King Pin Lock is a straightforward, well built anti-theft choice for RV and trailer owners who value mechanical strength and ease of use. With its handle, blossom cylinder and heavy steel construction it represents good value for anyone needing a visible, durable kingpin lock without electronic features.

Frequently Asked Questions

Will this fit a standard 5th wheel king pin?
Yes. The lock is sized for standard king pins with the listed inner and external diameters and is intended for RVs, campers and semi trailers.

What happens if I lose my keys?
Newer production batches include a key ID printed on the key; record that ID or a photo and the manufacturer can copy the key for you.

Is the lock weather resistant?
The lock uses solid steel with a coating to resist corrosion and is described as weather resistant for long-term outdoor use.