Your fifth wheel trailer is a significant investment, and protecting it from theft should be a top priority. A kingpin lock is a simple yet effective deterrent that prevents thieves from hitching up and driving away with your RV or semi-trailer. With so many options on the market, choosing the right one can feel overwhelming.
This guide breaks down the top 10 kingpin locks, highlighting their key features, strengths, and potential drawbacks. Whether you prioritize maximum security, ease of use, or high visibility, you will find a lock that fits your needs and budget. Read on to make an informed decision and secure your trailer with confidence.
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BOYISEN 5th Wheel King Pin Lock, Solid Steel, with Handle and Warning Tag
Best forConvenient handling and unique key
- Solid steel construction
- Ergonomic handle design
ConsiderKey ID only in 2025 batches
METOWARE 5th Wheel King Pin Lock for RVs & Semi Trailers, Black
Best forHigh visibility warning tag
- Bright red warning tag
- High-strength iron build
ConsiderBulky design
Equipment Lock Heavy Duty 5th Wheel King Pin Lock – Powder Coated Steel 5th…
Best forHeavy-duty maximum security
- High-security barrel lock
- Alloy steel construction
ConsiderLimited color options
Equipment Lock 5th Wheel Trailer Kingpin Lock – Powder Coated Steel 5th Whe…
Best forSimple reliable universal fit
- High-security barrel lock
- Powder-coated steel
ConsiderNo warning tag included
Proven Industries PL-5 Kingpin Lock – Fifth-Wheel Coupler Security
Best forPick-resistant high security
- TIG-welded steel collar
- Stainless-steel pin
ConsiderHeavier than some models
BOYISEN 5th Wheel King Pin Lock, Solid Steel, Handle, Warning Tag, Black
Best forSleek black finish convenience
- Solid steel with black finish
- Convenient handle
ConsiderBlack finish may show scratches
Curt 23255 Dumbbell Style King Pin Lock
Best forLightweight aluminum simplicity
- Lightweight aluminum body
- Universal fit
ConsiderLess durable than steel
RVMATE 5th Wheel Lock, Yellow, Heavy Duty Steel King Pin Lock
Best forBright yellow high visibility
- Heavy-duty steel construction
- Bright yellow warning color
ConsiderLimited color options
BOYISEN 5th Wheel King Pin Lock, Solid Steel, Handle, Warning Tag, Red
Best forRed finish with warning tag
- Solid steel with red finish
- Convenient handle
ConsiderRed may fade over time
METOWARE 5th Wheel King Pin Lock for RVs & Semi Trailers, Red
Best forRed high-visibility warning
- Bright red warning tag
- High-strength iron build
ConsiderIron may be heavier than steel
BOYISEN 5th Wheel King Pin Lock – Convenient Handle
Brand: BOYISEN
A user-friendly solid steel lock with a unique key system for enhanced security.
The BOYISEN kingpin lock stands out with its ergonomic handle and outward-facing cylinder, making locking and unlocking a breeze compared to traditional downward designs. Constructed from solid steel rather than casting steel, it offers superior weather resistance and is tough to break. The unique blossom lock mechanism ensures that no other BOYISEN owner will have the same key, adding a layer of security.
You receive three keys with your purchase, and the 2025 batches include a key ID printed on the key for easy replacement if lost. This lock is designed for convenience without compromising on protection. The handle makes it easy to carry and position, while the solid steel body gives you peace of mind that your trailer is secure.
- Solid steel construction
- Ergonomic handle design
- Unique blossom key system
- Key ID only in 2025 batches
- Handle may catch on items
METOWARE 5th Wheel King Pin Lock – High Visibility
Brand: METOWARE
A durable, high-visibility lock that reminds you to remove it before hitching.
The METOWARE kingpin lock features a 12-inch chain and a bright red warning label tag that serves as a constant reminder to remove the lock before hitching. This high-visibility design is not only practical but also acts as a deterrent to potential thieves. Made from high-strength iron with a double-layer electrostatic coating, it is built to withstand weather and resist damage.
Installation takes seconds, and you get two keys for convenience. The precision anti-theft design fully encloses the main pin, effectively preventing drilling and other tampering attempts. This lock is a reliable choice for RV owners who want a clear visual cue and robust protection without any complicated setup.
- Bright red warning tag
- High-strength iron build
- Quick and easy installation
- Bulky design
- Iron may be heavier than steel
Equipment Lock Heavy Duty Kingpin Lock – Maximum Security
Brand: THE EQUIPMENT LOCK COMPANY
A robust, high-security lock that fully covers the kingpin for maximum theft deterrence.
The Equipment Lock Heavy Duty Kingpin Lock is designed for maximum security, featuring a high-security barrel lock system that fully covers your trailer’s 2-inch kingpin. This makes it nearly impossible for thieves to attach a hitch and tow your trailer away. Constructed from high-quality alloy steel with a bright red powder coating, it is both tough and visually conspicuous.
No mounting is required – simply slide the lock onto the kingpin, secure it with the included key, and you are ready to go. The user-friendly design ensures that even first-time users can secure their trailer in seconds. This lock is a universal solution for fifth wheel RVs and trailers, offering long-lasting reliability and peace of mind.
- High-security barrel lock
- Alloy steel construction
- Tool-free installation
- Limited color options
- May be overkill for low-risk areas
Equipment Lock 5th Wheel Kingpin Lock – Reliable Protection
Brand: THE EQUIPMENT LOCK COMPANY
A dependable, easy-to-use lock that provides solid security for your fifth wheel.
The Equipment Lock 5th Wheel Kingpin Lock offers a reliable and universal solution for trailer and RV security. It features a high-security barrel lock system that covers your 2-inch kingpin, making it impossible for unauthorized hitches to connect. The powder-coated steel construction ensures durability and weather resistance, so it can withstand the elements without rusting or corroding.
Operation is straightforward: slide the lock onto the kingpin, secure it with the key, and you are done. Each purchase includes two keys, so you always have a spare. This lock is an excellent choice for those who want a dependable, no-fuss security solution that doesn’t require any mounting hardware or complex installation.
- High-security barrel lock
- Powder-coated steel
- Comes with two keys
- No warning tag included
- Basic design
Proven Industries PL-5 Kingpin Lock – Pick-Resistant Design
Brand: Proven Industries
A tough, pick-resistant lock with a robust design for serious security needs.
The Proven Industries PL-5 Kingpin Lock is engineered with a solid-steel TIG-welded collar and a 303 stainless-steel pin, making it incredibly tough against burglars. Its unique key design prevents picking, and the interior locking mechanism adds an extra layer of security that is hard to bypass. This lock is built to protect your 18-wheeler or camper from theft.
It fits all fifth-wheel trailers, offering a universal solution for various setups. The TIG-welded construction ensures strength and longevity, while the stainless-steel pin resists corrosion. If you are looking for a lock that prioritizes pick resistance and rugged durability, the PL-5 is a top contender.
- TIG-welded steel collar
- Stainless-steel pin
- Unique anti-pick key
- Heavier than some models
- Premium price point
BOYISEN 5th Wheel King Pin Lock – Black Finish
Brand: BOYISEN
A stylish and functional lock with a convenient handle and warning tag.
This BOYISEN kingpin lock in black offers the same convenient handle and outward-facing cylinder as its counterpart, making it easy to lock and unlock. The solid steel construction is weather-resistant and hard to break, providing reliable security for your trailer. The unique blossom key system ensures that only you have the key to your lock.
The high-visibility warning tag is a thoughtful addition, reminding you to remove the lock before hitching. The black finish gives it a sleek, understated look that blends well with most trailers. If you prefer a darker aesthetic without sacrificing functionality, this lock is an excellent choice.
- Solid steel with black finish
- Convenient handle
- High-visibility warning tag
- Black finish may show scratches
- Key replacement requires ID
Curt 23255 Dumbbell King Pin Lock – Lightweight Aluminum
Brand: CURT
A lightweight, simple lock that offers basic security with easy handling.
The Curt 23255 Dumbbell Style King Pin Lock is a classic choice, featuring a strong aluminum body that provides reliable security without adding excessive weight. Its universal design fits most 5th wheel trailer kingpins, making it a versatile option for various setups. The dumbbell shape is simple yet effective, deterring theft by preventing hitch attachment.
Two keys are included for your convenience, and the aluminum construction offers good corrosion resistance. While it may not have the heavy-duty feel of steel locks, it is lightweight and easy to handle. If you prioritize portability and simplicity, this lock is a practical choice.
- Lightweight aluminum body
- Universal fit
- Two keys included
- Less durable than steel
- No warning tag
RVMATE 5th Wheel Lock – Bright Yellow Visibility
Brand: RVMATE
A durable, high-visibility lock that effectively deters theft with its bright design.
The RVMATE 5th Wheel Lock features a bright yellow finish that serves as a strong visual warning to potential thieves and a reminder for you to remove it before hitching. Made from heavy-duty steel with a copper component and welded construction, it is built to last. The electrostatic surface treatment enhances its durability and weather resistance.
With a height of 83mm and an internal diameter of 74mm, it fits 50mm diameter trailer pins universally. The bright yellow color is not only eye-catching but also adds a layer of safety by making the lock highly visible. This lock is a solid choice for those who want a durable, high-visibility security solution.
- Heavy-duty steel construction
- Bright yellow warning color
- Universal fit for 50mm pins
- Limited color options
- May be bulky for some users
BOYISEN 5th Wheel King Pin Lock – Red Finish
Brand: BOYISEN
A durable, stylish lock with a convenient handle and high-visibility warning tag.
This BOYISEN kingpin lock in red combines the same convenient handle and outward-facing cylinder design with a vibrant red finish. The solid steel construction ensures it is weather-resistant and difficult to break, providing robust security for your trailer. The unique blossom key system guarantees that your lock is keyed uniquely, so no other BOYISEN owner can open it.
The high-visibility warning tag is included, helping you remember to remove the lock before hitching. The red color adds a touch of style while also making the lock more noticeable. If you want a lock that is both functional and visually appealing, this red version is a great pick.
- Solid steel with red finish
- Convenient handle
- Unique blossom key system
- Red may fade over time
- Key replacement requires ID
METOWARE 5th Wheel King Pin Lock – Red Warning
Brand: METOWARE
A durable, high-visibility lock in red that offers reliable theft protection.
The METOWARE kingpin lock in red offers the same high-visibility warning tag and 12-inch chain as its black counterpart, ensuring you never forget to remove it before hitching. Made from high-strength iron with a double-layer electrostatic coating, it is built to withstand harsh weather and resist damage. The red color adds an extra layer of visibility, making it hard to miss.
Installation is quick and easy, and you get two keys for convenience. The precision anti-theft design fully encloses the kingpin, preventing drilling and other tampering attempts. This lock is an excellent choice for RV owners who want a bright, durable, and secure solution.
- Bright red warning tag
- High-strength iron build
- Quick installation
- Iron may be heavier than steel
- Bulky design
Buyer’s Guide: What to Consider
Choosing the right kingpin lock involves considering several factors, from material strength to ease of use. This buying guide highlights key aspects to help you make an informed decision that matches your security needs and preferences.
- Material and Build Quality: Look for locks made from solid steel or high-strength iron for maximum durability. Powder coating or electrostatic treatment adds weather resistance and prevents rust. Avoid locks made from casting steel, as they are more prone to breaking.
- Key System and Security: Consider the type of key system. Unique key designs, such as blossom locks or barrel locks, offer better security against picking. Some locks come with multiple keys, and others have key ID systems for easy replacement if lost.
- Ease of Use: Choose a lock that is easy to install and remove. Features like handles, outward-facing cylinders, and tool-free installation save time and effort. A warning tag or chain is a helpful reminder to remove the lock before hitching.
- Visibility and Warning Features: Bright colors like red or yellow and warning tags increase visibility, reminding you to remove the lock and deterring thieves. Some locks come with chains and tags, while others rely on the lock's color alone.
- Compatibility and Fit: Ensure the lock fits your kingpin size. Most locks are universal for 2-inch kingpins, but check the internal diameter and height specifications. Some locks are designed for specific pin diameters, so verify compatibility before purchasing.
Conclusion
Securing your fifth wheel trailer is essential, and a quality kingpin lock is a simple yet effective deterrent. The options reviewed here range from heavy-duty steel locks with advanced key systems to lightweight aluminum models that prioritize convenience. Consider your specific needs, such as visibility, ease of use, and security level, to find the perfect fit.
For most RV owners, the BOYISEN locks offer a great balance of convenience and security, while the Proven Industries PL-5 stands out for its pick-resistant design. Whichever you choose, investing in a reliable kingpin lock will give you peace of mind knowing your trailer is protected.
Erica Steven is the founder and lead writer of WorstBrands, a site dedicated to providing honest and trustworthy reviews about outdoor gear and fashion products.
With a passion for exploring the great outdoors and staying up to date on the latest fashion trends, Erica uses her expertise to provide valuable insights into the products that matter most to her readers.
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