1. King Pin Locks: Securing Parked Trailers
Parked and dropped trailers are prime targets for cargo thieves. Without a king pin lock, criminals can easily hook up and drive off with an entire load in minutes.
The ENFORCER® King Pin Lock is built with heavy-duty steel and an ABLOY® cylinder, creating a secure barrier that prevents unauthorized tractors from connecting. These locks are quick to install, highly visible as a theft deterrent, and a must-have for fleets that frequently stage equipment in drop yards or customer locations.
2. Landing Gear Locks: Immobilizing Trailers
When trailers sit idle, securing the landing gear is critical. A landing gear lock prevents thieves from raising the support legs and hauling the trailer away.
The ENFORCER® landing gear lock slips over the crank handle and secures it with an ABLOY® padlock, keeping the trailer immobilized. It’s an inexpensive yet highly effective way to reduce theft risk in staging yards and high-traffic distribution centers.
3. High-Security Hasps for Swing Doors
Trailer doors are often the most vulnerable entry points for thieves. A high-security hasp, paired with an ABLOY® padlock, creates barrier that resists cutting, prying, and forced entry.
ENFORCER® offers both 8000 and 8014 series hasps, engineered with hardened steel and tamper-resistant designs. When installed, they shield the padlock's shackle, making it far more difficult for thieves to bypass.
4. Auto-Locking Trailer Lock Box for Driver Convenience
In the fast-paced world of trucking, drivers don’t always have time to fumble with keys. Auto-locking trailer lock boxes provide immediate security without requiring manual locking.
ENFORCER® Trailer Lock Box automatically engages when the door closes, ensuring trailers are secured every time without relying on driver intervention. This feature reduces the risk of human error while streamlining operations for fleets.
5. Weather-Resistant Padlocks for Long-Haul Durability
Long-haul routes expose equipment to harsh weather: rain, snow, salt, and dust. Standard padlocks often corrode or freeze, leaving trailers vulnerable.
ABLOY® high-security padlocks, available through Transport Security, are specifically designed to resist extreme environments. Their rotating disc cylinder resists freezing, while the hardened steel construction prevents cutting and drilling. These padlocks deliver long service life, making them an excellent investment for fleets operating nationwide.
6. Seal Guard Locks to Stop Tampering
Cargo seals are often used to ensure shipments remain untouched. If a seal is tampered with, oftentimes the load is turned away. A seal guard lock solves this by protecting the seal itself from removal or tampering.
The ENFORCER® 5950 Seal Guard Lock shields seals from cutters and prying tools while also functioning as a physical trailer door lock. This dual-purpose design offers layered protection for high-value shipments, particularly in industries with strict chain-of-custody requirements.
7. Adjustable Trailer Door Locks: Flexible, Non-Permanent Protection
For fleets that operate a mix of owned, leased, or seasonal trailers, security equipment needs to adapt without requiring permanent installation. An adjustable trailer door lock is designed to fit a variety of trailer and container sizes, securing swing and barn-style doors without drilling or modifications.
The ENFORCER® Adjustable Trailer Door Lock (1217) is heavy-duty steel and quickly clamps onto the trailer’s doors, delivering strong protection that can be removed just as easily. Because it isn’t permanently installed, it’s the perfect solution for peak season rentals, drop-and-hook operations, or any time equipment turnover is high.
8. Smart Locks with Key Tracking and Electronic Access
The digital age has brought new solutions to fleet security. Smart locks provide electronic access management, allowing fleets to monitor who opens a trailer and when.
Some models offer key tracking, audit logs, and even remote access capabilities, giving fleet managers complete visibility. While not a replacement for traditional locks, smart locks can complement physical security and integrate with broader risk management systems.
10. Key Considerations Before Choosing a Trailer Lock
Not all locks are equal, and fleets should evaluate their options carefully. Here are some key considerations:
Threat Environment: Identify whether your greatest risk is theft of entire trailers, door break-ins, or seal tampering.
Durability Needs: Choose locks that withstand the climate and conditions your fleet operates in.
Operational Efficiency: Look for solutions that drivers can use consistently without slowing down operations.
Compatibility: Ensure the locks integrate with hasps, hardware, and fleet-wide key systems.
Return on Investment: Consider not just the upfront cost but the savings from theft prevention, lower insurance premiums, and preserved customer relationships.
As cargo theft tactics evolve in 2025, fleets must prioritize physical deterrence alongside technology and monitoring. Trailer locks remain one of the most effective ways to block criminals from accessing freight, moving trailers, or tampering with seals.
From king pin locks and landing gear immobilizers to ABLOY®-equipped padlocks and smart lock solutions, the right combination of security hardware can dramatically reduce theft risk while protecting profits and reputations.
For trucking companies, the message is clear: invest in proven trailer locks today to prevent costly theft tomorrow. With Transport Security’s ENFORCER® line, fleets gain access to a comprehensive suite of solutions trusted by industry leaders for over four decades.
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