BOYISEN 5th Wheel King Pin Lock — Solid Steel Anti-Theft with Handle & Warning Tag (Black)

BOYISEN 5th Wheel King Pin Lock is a heavy-duty, solid-steel anti-theft device for 5th wheel trailers that adds an easy-turn handle, a visible warning tag, and a unique blossom key for secure towing protection.

Keep your RV, camper, or commercial trailer secure with a lock built for daily use and harsh conditions. Instead of fragile cast parts, this kingpin lock uses solid steel construction for improved resistance to cutting and tampering. A user-friendly handle and outward-turning cylinder make locking and unlocking simpler when you're working underneath the trailer, while a bright warning tag helps prevent accidental attempts to hitch with the lock in place.

How does the handle improve usability when accessing the kingpin under a trailer?

The built-in handle and outward-turning cylinder change the way you operate the lock compared with common designs that turn downward. This reduces awkward wrist positions and gives you more leverage when tightening or removing the lock in low-clearance spaces beneath the trailer.

• Handle for better grip and leverage
• Cylinder turns outward for easier reach
• Designed for confined spaces under the trailer

What makes this lock more resistant to theft and tampering?

BOYISEN uses solid steel instead of cast parts, raising the bar for durability and resistance to forced entry. The lock mechanism relies on a blossom-style key that is harder to replicate and less likely to shear than flat keys, and the package includes three keys so you have a backup.

• Solid-steel housing resists cutting and impact
• Blossom key profile reduces picking and breaking risks
• Three keys supplied for convenience and backup

Will the warning tag help prevent accidental hitching with the lock installed?

Yes — the bright warning tag is designed to catch your eye before hitching, serving as a visual reminder to remove the kingpin lock. Its visibility reduces the chance of a risky or damaging attempt to couple while the lock remains in place.

• High-visibility tag for pre-hitch checks
• Alerts drivers and ground crew before coupling
• Durable attachment built to endure outdoor conditions

Is this kingpin lock compatible with different trailers and fleet setups?

The BOYISEN kingpin lock is made for universal 5th wheel applications including RVs, campers, boat trailers, and many commercial container trailers. Its robust design and straightforward operation make it well-suited for fleet managers, RV owners, and dealers who need reliable theft deterrence across multiple units.

• Fits standard 5th wheel kingpins used across RV and commercial trailers
• Good option for trucking fleets, RV dealers, and private owners
• Weather-resistant finish for long-term outdoor exposure

Who is this for: The BOYISEN 5th Wheel King Pin Lock is intended for RV owners, fleet operators, and anyone who needs a tougher, more user-friendly anti-theft solution for 5th wheel trailers. Choose it if you want a heavy-duty steel lock with an ergonomic handle, a blossom key system for added security, and a prominent warning tag that reduces hitching mistakes. For any issues, BOYISEN offers customer support and a satisfaction-focused return policy.