The 7 Best Trailer Locks in 2025
The best trailer lock in 2025 is the AMPLock Flat Lip Design BRP 2, a heavy-duty ball coupler lock built for maximum theft resistance and long-term durability. But depending on your trailer type, budget, and installation preferences, there are other great options worth considering.
In this guide, we’ve reviewed the top 7 trailer locks, highlighting their pros, cons, and what makes each one stand out.
1. Flat Lip Design BRP 2 Trailer Lock
Brand: AMPLock
Type: Ball coupler lock
Pros
✅ Heavy-duty materials: Made of ductile cast iron and stainless steel, this ball coupler lock offers strong resistance to cutting, drilling, impact, and torch attacks.
✅ Custom-fit design: Precisely molded for 2″ flat‑lip couplers, fits snugly with zero wobble.
✅ Advanced locking mechanism: Patented rotating‑disc-style core with millions of key combinations resists picking and drilling.
✅ Weather resilience: E-coat/electrostatic paint finish + sealed cylinder withstands corrosion and freezing.
✅ Push-and-lock operation: Installs easily without tools, just push into place.
✅ High deterrence: Weighs around 10 lbs and includes a swivel shield to resist leverage and towing attempts.
✅ North American-made: Backed by a 5‑year warranty, 30‑day returns, and strong reputation with 250,000+ customers.
Cons
❌ Flat-lip only: Designed exclusively for flat-lip couplers; won’t fit rolled‑lip or lipless models.
2. Trailer Door Lock & Containers PDC
Brand: AMPLock
Type: Trailer door lock
Pros
✅ Solid construction: Cast-iron and steel build provides strong resistance to cutting, drilling, and impact.
✅ Custom-fit design: Molded to fully cover and lock the door latch, ensuring zero wobble and enhanced security.
✅ High-security lock mechanism: Disc-style tumbler offers millions of key combinations and high resistance to picking and drilling.
✅ Weather protection: E-coat finish and sealed locking cylinder protect against rust and harsh environments.
✅ Simple installation: Push-and-lock system makes securing these high-quality trailer locks quick and tool-free.
✅ Keyed-alike option: Available with matching key codes across multiple locks for fleet or personal convenience.
✅ Backed by warranty: Includes a 5-year warranty, 30-day returns, and strong North American customer support.
Cons
❌ Bulky size: Its heavy design can impede clearance and may feel cumbersome for frequent installation.
3. Ball Coupler Lock for Standard Trailer TLS‑2
Brand: AMPLock
Type: Ball coupler lock
Pros
✅ Heavy-duty materials: Ductile cast iron and stainless steel construction resists cutting, drilling, impacts, and extreme force.
✅ Custom-fit design: Precisely molded for 2″ flat-lip couplers, ensuring a snug, wobble-free fit.
✅ Advanced lock mechanism: Patented rotating-disc core with millions of key combinations prevents picking and drilling.
✅ Weather resistance: E-coat/electrostatic finish and sealed lock cylinder stand up to corrosion and harsh conditions.
✅ Push-and-lock operation: Simple, tool-free installation, just push into place.
✅ Lock deterrent: Weighs about 4.5 lb to slow down thieves, and places the cylinder where it's hard to access.
✅ Solid reputation: Over 250,000 North American installations and strong community praise.
Cons
❌ Flat-lip only: Compatible only with flat-lip couplers, not suitable for rolled-lip or lipless designs.
4. No Lip Design BRA‑2 Trailer Locks
Brand: AMPLock
Type: Ball coupler lock
Pros
✅ Specialized design: Custom‑molded to fit “no lip” 2″ and 2 5/16″ couplers precisely for a secure, wobble‑free lock.
✅ Ultra-durable construction: Made with heavy-duty ductile cast iron and stainless steel, this ~12‑lb lock withstands cutting, impacts, grinders, torches, and extreme force.
✅ Patented disc tumbler core: Rotating‑disc lock offers nearly a million unique key combinations and strong resistance to picking and drilling.
✅ Weather-resistant finish: E-coat and electrostatic paint plus sealed internals protect against rust and freezing elements.
✅ Push-and-lock convenience: Tool-free installation, just place, push, and lock instantly.
✅ North American-backed: Includes free shipping (US/CA), 5‑year warranty, 30‑day returns, and support from a trusted brand with 250K+ users .
Cons
❌ Limited compatibility: Only fits couplers without a lip; won’t work on rolled-lip or flat-lip styles.
❌ Size may be bulky: Some users report it can be “really big” and may not fit neatly on smaller or unusual couplers .
5. Titan Weld‑On Design BRHT‑2516 Trailer Locks
Brand: AMPLock
Type: Ball coupler lock
Pros
✅ Custom-fit for weld-on couplers: Molded specifically for 2 5/16″ Titan weld-on couplers, creating a snug, no-wobble fit that effectively becomes part of the hitch.
✅ Rugged construction: Made from ductile cast iron with stainless steel reinforcement, this ~12-pound lock is designed to resist cutting, impact, torch attack, and even liquid nitrogen exposure.
✅ Patented disc lock mechanism: Features a rotating-face disc tumbler with millions of key combinations, offering strong resistance to picking and drilling.
✅ Weatherproof design: Coated with e-coat/electrostatic finish and sealed to resist rust, freezing, and harsh environmental conditions.
✅ Push-and-lock operation: Tool-free installation makes it quick and easy to secure, just push into place.
✅ Exceptional warranty and support: Includes free North American shipping, a 5-year warranty, 30-day returns, and dedicated customer support .
Cons
❌ Limited compatibility: Only fits 2 5/16″ Titan weld-on style couplers, not compatible with rolled-lip, flat-lip, or lipless couplers.
6. Model 2178 Trailer Locks
Brand: Proven Industries
Type: Coupler lock
Pros
✅ Exceptional fitment and versatility: Model 2178 is the company’s best-selling lock, designed to fit the most common 2″ coupler styles, from A‑frame welded to bolt‑on, and uniquely secures S‑hook safety chains inside the lock body.
✅ Rugged construction: Heavy-duty billet 6061 aluminum (or optional solid 303 stainless steel), plus hardened steel locking parts, resist attacks with tools like crowbars or saws.
✅ High-security Cobra 7 core (standard): A patented 7‑pin tubular keyway, resistant to key copying and common tampering, at no extra cost.
✅ Made in the USA with responsive support: Proven Industries is a US-based, family-owned manufacturer with same‑day shipping on many locks and positive customer service reputation.
✅ Easy to install and low maintenance: Users report the lock is simple to mount and remove; the Cobra 7 core tolerates dirt and grit, reducing required upkeep.
Cons
❌ Premium price tag: Typically priced around $345–$345 for stainless, making it significantly more expensive than basic coupler locks.
❌ May not fit every coupler type: Despite broad compatibility, some models (like A‑frame or Demco latches) may require different 2178 variants, and fit issues occasionally arise.
❌ Core vulnerability to drilling: Some report that determined thieves can drill the Cobra 7 core, and recommend pairing with a hardened puck lock for extra security.
7. Curt Style Coupler Lock
Brand: Ft. Knox
Type: Coupler lock
Pros
✅ Heavy-duty construction: Made from cold‑rolled steel that resists bolt cutters, pry bars, and hammers – strong enough to deter opportunistic thieves.
✅ Premium puck lock integration: Equipped with a high-quality puck lock (often Trimax or Cobra), concealed shackle and downward keyway offer superior security compared to basic padlocks.
✅ Visual deterrent effect: The bright yellow housing signals toughness, causing many thieves to move on.
✅ Chain storage capability: Allows the safety chains to be stored inside the housing, keeping everything secure and tidy.
✅ Positive real-world feedback: Trailer owners describe it as well‑made, sturdy, and effective at discouraging quick-theft attempts.
Cons
❌ Not impervious to professionals: Determined thieves with grinders or torches can still breach it, its value lies in deterring non-professionals.
❌ Fitment considerations: Requires the correct model (e.g., Attwood vs. Ram style); some users report needing minor adjustments for proper fit.
What Are the Different Trailer Locks?
Coupler Locks
Coupler locks provide a robust defense against trailer theft by securing the hitch coupler and preventing unauthorized access to the connection point. Many of the top-rated models are built with hardened steel for maximum resistance against tampering. Some options offer a universal fit, accommodating various trailer ball sizes, while others come with adjustable mechanisms to match different coupler styles.
For those managing multiple trailers, keyed alike options add convenience, allowing a single key to operate several locks. To enhance visibility and deter theft, bright color finishes are also available. Weatherproof models ensure that your trailer remains protected year-round, even in harsh conditions.
Wheel Locks
Wheel locks are designed to immobilize your trailer, effectively preventing it from being towed away. Built with heavy-gauge steel, these clamps are both durable and difficult to bypass. Many models feature adjustable arms to fit a wide range of tire sizes, and their bold, visible designs act as strong visual deterrents to potential thieves.
Installation is generally quick and straightforward, making them practical for regular use. Most quality locks also come with weather-resistant coatings to handle outdoor exposure, and keyed alike options can simplify security for owners with multiple trailers.
Trailer Door Locks
Serving as the final barrier between your cargo and would-be thieves, trailer door locks are crucial for securing access points. Among the most trusted are puck locks, which feature hardened steel bodies designed to resist cutting and tampering. Many users prefer keyed alike systems for easier management, especially when multiple locks are involved. To withstand outdoor conditions, weather-sealed models are recommended, and some options are specifically engineered to resist bolt cutters, offering enhanced peace of mind.
Hitch Pin Locks
Hitch pin locks play a key role in preventing unauthorized trailer attachment by replacing standard hitch pins with locking alternatives. Built with corrosion-resistant stainless steel, these locks are designed to last, even in tough environments. Popular versions include double-locking mechanisms for added security and rubber caps to protect the internal locking components from dirt and moisture.
They typically fit standard 1/2" and 5/8" receiver holes and are often designed with universal compatibility in mind, making them suitable for a wide variety of trailer hitches. As with other trailer locks, keyed alike options are also available for convenience.
Fifth-Wheel Locks
Fifth-wheel locks are a specialized solution for larger trailers, particularly effective at preventing partial couplings and unauthorized hook-ups by securing the kingpin. To maintain long-term performance, it’s important to regularly lubricate moving parts and inspect the lock for wear and tear. Storing the device in a dry location when not in use helps prevent corrosion, and a thorough cleaning after exposure to road grime ensures optimal function.
Buy Your Next Trailer Locks With AMPLock Today
Worried about trailer theft? We've got you covered. At AMPLock, we craft high-quality locks engineered to withstand extreme conditions and deter thieves. Our products, made from North American-sourced materials, offer unmatched security for your trailer.
With free shipping, a 30-day return policy, and a 5-year warranty, you can trust AMPLock to keep your valuables safe.
Frequently Asked Questions About Trailer Locks
How Do I Choose the Right Lock Type for My Trailer?
Selecting the perfect lock for your trailer involves considering various factors. Coupler locks secure the hitch, while wheel locks immobilize the wheels. Chain locks offer versatility, and kingpin locks protect fifth-wheel trailers. Your choice should match your trailer's design and usage. We recommend prioritizing locks with high-grade materials, pick-resistant mechanisms, and weather-resistant coatings. You'll want to look for options that provide both physical deterrence and visual discouragement to potential thieves.
Can a Wheel Lock Alone Prevent Theft?
Wheel locks are effective deterrents, but they shouldn't be your only line of defense. While they make it difficult to tow your trailer away, determined thieves might find ways around them. We strongly advise using multiple security measures together. Combine a wheel lock with a coupler lock or chain for comprehensive protection. You should always think like a thief and address all potential vulnerabilities. Remember, layering different lock types creates a formidable barrier against theft.
How Often Should I Inspect and Replace My Lock?
Regular lock inspections are crucial for maintaining security. Check your locks monthly for signs of rust, damage, or wear. Look out for stiff mechanisms, visible corrosion, or key difficulties. You must replace locks immediately if you notice any of these issues. We suggest setting a reminder to inspect your locks before each trip. Proper maintenance extends lock life, but even well-maintained locks should be replaced every 3-5 years. Your trailer's security depends on vigilant upkeep of all locking devices.
