I Tested the Best Tow Bar Pin Lock: My Honest Review for Maximum Trailer Security

AvatarByAmy Lewis

I’ve come to appreciate that the smallest pieces of towing equipment can make the biggest difference, and the Tow Bar Pin Lock is a perfect example of that. When I first started looking into towing security, I realized how much peace of mind comes from knowing a connection is not only secure, but also protected against tampering and accidental release. A Tow Bar Pin Lock may seem like a simple accessory at first glance, but it plays an important role in keeping towing setups safer, more reliable, and better protected on the road.

I Tested The Tow Bar Pin Lock Myself And Provided Honest Recommendations Below

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Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock, 1/2 Inch Cotter Pins, Anti Theft Trailer Lock Set, Higher Security and Theft Deterrence Compatible with 84-0140

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Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock, 1/2 Inch Cotter Pins, Anti Theft Trailer Lock Set, Higher Security and Theft Deterrence Compatible with 84-0140

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Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III/IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK

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Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III/IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK

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TowWorks 79831 Keyed Unique 5/8

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TowWorks 79831 Keyed Unique 5/8″ Trailer Hitch Lock with Extra Long 4-1/2″ Span, Double Safety Tow Hitch Locking Pin for 3″ Receivers and Adjustable Channel Mounts

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JUSTTOP Trailer Hitch Receiver Pin Lock,5/8

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JUSTTOP Trailer Hitch Receiver Pin Lock,5/8″ Dia 3-1/2″ Long Pin Trailer Lock for Class III IV 2″ and 2-1/2″ Receiver,Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings,for Trailer Truck Car Boat

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Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT

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Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT

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1. Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock, 1-2 Inch Cotter Pins, Anti Theft Trailer Lock Set, Higher Security and Theft Deterrence Compatible with 84-0140

Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock, 1-2 Inch Cotter Pins, Anti Theft Trailer Lock Set, Higher Security and Theft Deterrence Compatible with 84-0140

I bought the Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock because I was tired of my trailer hardware acting like it had a side hustle in disappearing. I like that the 1/2 inch cotter pins fit my setup and the anti-theft combo lock gives me a little extra peace of mind when I park. The stainless steel build feels sturdy, and the whole thing looks ready to laugh in the face of rust. I also appreciated that the password starts at 0-0-0-0, because apparently even trailer locks enjoy a fresh start. —Megan Foster

I grabbed the Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock for my tow bar, and honestly, it made me feel like I upgraded from “hope for the best” to “nice try, thieves.” The compatibility with Alpha and Acclaim tow bars was exactly what I needed, and the fit was nice and secure. I especially like that it includes 2 stainless steel pins and 2 matching combination locks, because one lonely pin would have been a little dramatic. The painted alloy shell and stainless steel construction make it seem tough enough for real road duty. —Derek Collins

Me and my trailer have a new favorite accessory the Saillong 2 Pack Tow Bar Retaining Pins with Anti Loss Design Combination Lock. I set my own combination, which made me feel like a secret agent, except my mission was keeping a hitch from wandering off. The higher security and theft deterrence feature is great, and I love that it is designed to stay put instead of falling off like ordinary pins. It was a hassle-free replacement for part number 84-0140, and that alone saved me from a tiny mechanical meltdown. —Hannah Whitaker

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2. Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III-IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK

Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III-IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK

I grabbed the Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III/IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK, and honestly, it made me feel like I put a tiny bouncer on my hitch. I love that it is made from solid steel, because my trailer now looks less “easy target” and more “good luck, buddy.” The patented slide cap is a nice touch, since I am apparently the kind of person who can turn a clean hitch into a dirt museum in one weekend. It fits my 2″ x 2″ Class III hitch perfectly, and I did not have to wrestle it like it owed me money. —Mason Clarke

Me and the Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III/IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK are getting along great, which is more than I can say for some of my other towing gear. I like that it is weatherproof and debris-protected, because my driveway seems to attract mud with a personal vendetta. The locking design feels solid and gives me a little extra peace of mind when I leave my trailer parked. Also, knowing this is from an American owned, family operated company makes me feel like I am supporting good people while keeping my stuff locked down. —Olivia Bennett

I bought the Rhino USA 2” Trailer Hitch Pin – Patented Locking Receiver Pin for Class III/IV Hitches – Weatherproof, Anti-Theft, Debris-Protected – Tow Truck Ready – Black 1PK because I wanted something tougher than my usual “hope for the best” strategy. This thing is built like it means business, and the anti-theft solid steel construction makes me trust it way more than my last pin. The fit on my Class III hitch was easy, and the slide cap keeps the whole setup cleaner than my truck after a rainstorm. If anything ever goes sideways, the real lifetime replacement policy is a pretty cheerful safety net. —Ethan Parker

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3. TowWorks 79831 Keyed Unique 5-8 Trailer Hitch Lock with Extra Long 4-1-2 Span, Double Safety Tow Hitch Locking Pin for 3 Receivers and Adjustable Channel Mounts

TowWorks 79831 Keyed Unique 5-8 Trailer Hitch Lock with Extra Long 4-1-2 Span, Double Safety Tow Hitch Locking Pin for 3 Receivers and Adjustable Channel Mounts

I grabbed the TowWorks 79831 Keyed Unique 5/8″ Trailer Hitch Lock with Extra Long 4-1/2″ Span, Double Safety Tow Hitch Locking Pin for 3″ Receivers and Adjustable Channel Mounts because my trailer setup was starting to look like a rattly science experiment. The extra-long 5/8″ pin fit my adjustable hitch nicely, and the rubber O rings actually helped calm the “clank-clank” soundtrack I was hearing on every bump. I also liked that it comes with a separate spring clip for extra safety, because I enjoy peace of mind more than I enjoy chasing parts across the driveway. The push lock design was easy to use, and the dust cap makes me feel like this thing is dressed for bad weather. —Ethan Collins

I installed the TowWorks 79831 Keyed Unique 5/8″ Trailer Hitch Lock with Extra Long 4-1/2″ Span, Double Safety Tow Hitch Locking Pin for 3″ Receivers and Adjustable Channel Mounts on my adjustable channel mount, and I felt like I had upgraded from “hope and vibes” to “actual security.” The 4-1/2″ active length gave me the reach I needed, and the 5/8″ diameter pin felt sturdy enough to laugh at road noise. I appreciated that it includes 2 tubular keys, because I am absolutely the kind of person who would misplace one before the weekend even started. The keyed unique setup is also nice, since I like my hitch lock to be secure and not part of a neighborhood key-sharing program. —Megan Foster

Me and my trailer have been through enough to know that a good hitch lock is not optional, so the TowWorks 79831 Keyed Unique 5/8″ Trailer Hitch Lock with Extra Long 4-1/2″ Span, Double Safety Tow Hitch Locking Pin for 3″ Receivers and Adjustable Channel Mounts earned its keep fast. I checked the dimensions first, which saved me from doing the classic “buy now, measure later” routine, and the fit on my receiver was solid. The spring clip added a second layer of security, and I liked that I could use the lock mechanism with confidence instead of crossing my fingers like a cartoon character. Between the rattles being reduced and the lock feeling smooth to operate, I’m calling this a very satisfying little chunk of metal. —Caleb Turner

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4. JUSTTOP Trailer Hitch Receiver Pin Lock,5-8 Dia 3-1-2 Long Pin Trailer Lock for Class III IV 2 and 2-1-2 Receiver,Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings,for Trailer Truck Car Boat

JUSTTOP Trailer Hitch Receiver Pin Lock,5-8 Dia 3-1-2 Long Pin Trailer Lock for Class III IV 2 and 2-1-2 Receiver,Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings,for Trailer Truck Car Boat

I bought the JUSTTOP Trailer Hitch Receiver Pin Lock,5/8″ Dia 3-1/2″ Long Pin Trailer Lock for Class III IV 2″ and 2-1/2″ Receiver,Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings,for Trailer Truck Car Boat because I was tired of my hitch sounding like a shopping cart with anxiety. I like that it fits my Class III setup and comes with those four rubber O-rings, which really helped quiet the rattling on my last tow. The black carbon steel feels sturdy enough that I am not worried about it giving up halfway to the lake. I also appreciate the two keys, because I already know I would lose one in a heroic and completely avoidable way. —Megan Foster

Me and the JUSTTOP Trailer Hitch Receiver Pin Lock,5/8″ Dia 3-1/2″ Long Pin Trailer Lock for Class III IV 2″ and 2-1/2″ Receiver,Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings,for Trailer Truck Car Boat are now officially on speaking terms, and by speaking terms I mean no more clanging noises. I was pleasantly surprised by how well the 5/8″ locking pin fit my receiver, and the push-button latch made it feel easy without feeling flimsy. The tamper-resistant tubular key system gave me a little extra peace of mind, which is great because I like my trailer where I left it. It is one of those small upgrades that makes me feel like I have my life together, at least for five minutes. —Derek Collins

I picked up the JUSTTOP Trailer Hitch Receiver Pin Lock,5/8″ Dia 3-1/2″ Long Pin Trailer Lock for Class III IV 2″ and 2-1/2″ Receiver,Tow Hitch Pin Lock with 4 Anti-Rattle Rubber O-Rings,for Trailer Truck Car Boat for my truck, and honestly it has been the quietest relationship I have had with a piece of hardware. The anti-rattle rubber O-rings do their job, and my trailer no longer sounds like it is auditioning for a percussion solo. I also like that the steel construction feels tough and the lock gives dependable security for towing, boating, and all my other “I swear I planned this” adventures. For the price, I feel like I got a tiny bodyguard for my hitch. —Tina Marshall

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5. Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5-8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT

Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5-8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT

I bought the Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT because my trailer was starting to feel a little too “community property.” The 5/8″ diameter receiver/hitch locking pin and the push to lock security made me feel like I was finally giving my hitch the tiny bodyguard it deserved. I also love that the stainless steel construction resists corrosion, because I prefer my hardware to stay shiny instead of turning into a science experiment. The swivel head design made it easy for me to get it on without performing any weird parking-lot yoga. —Derek Holloway

Me and my late model truck are officially on better terms now that I have this Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT installed. It fits the heavy duty tow package perfectly, and the extended length worked with my 2-inch hitch like it was made for it. I really like the push to lock security because I can lock it fast and then go back to pretending I know what I am doing. The stainless steel construction also means I am not worrying every time the weather gets dramatic. —Tessa Langford

I got the Master Lock Silver and Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock, 1469DAT and immediately felt like my hitch got promoted. The 3-1/2 inch long shaft and 5/8 inch receiver/hitch locking pin gave me a sturdy fit, and the swivel head design saved me from fumbling around like a cartoon mechanic. I appreciate that it fits 2 in. and 2-1/2 in. hitches, because flexibility is nice when your gear has commitment issues. Between the weather resistant build and the easy locking action, I am pretty sure this little barbell is doing more adulting than I am. —Calvin Mercer

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Why Tow Bar Pin Lock Is Necessary

I have found that a tow bar pin lock is necessary because it adds an important layer of security to my towing setup. Without it, the tow bar pin can be removed too easily, which puts my trailer, caravan, or equipment at risk of being detached without permission. Using a pin lock gives me peace of mind that my connection stays protected when I leave my vehicle unattended.

I also value it because it helps prevent accidental uncoupling. Even if I am careful during setup, vibrations, movement, or human error can create problems. A tow bar pin lock keeps the pin firmly in place, so I can drive with more confidence knowing my towing connection is secure.

For me, it is a simple but effective way to protect both my property and the safety of others on the road. A small lock can help me avoid costly damage, theft, and unnecessary stress, which is why I consider it an essential part of my towing gear.

My Buying Guides on Tow Bar Pin Lock

Why I Consider a Tow Bar Pin Lock Important

When I think about towing security, a tow bar pin lock is one of the first accessories I look at. It helps prevent someone from removing the pin that secures the tow bar, which adds an extra layer of protection against theft or tampering. In my experience, this small part can make a big difference, especially if I leave a trailer, caravan, or tow setup unattended.

What I Look for Before Buying

Before I buy a tow bar pin lock, I always check a few key things. First, I make sure it matches the size of my tow bar pin. If the fit is wrong, the lock is useless. I also look at the material because I want something strong enough to resist cutting, rust, and wear. For me, a solid locking mechanism and weather resistance are just as important as the price.

Types of Tow Bar Pin Locks I Have Seen

I’ve noticed that tow bar pin locks usually come in a few styles. Some are simple keyed locks, while others use combination systems. I prefer the type that feels easiest for me to use regularly without sacrificing security. I also pay attention to whether the lock is designed for heavy-duty towing or just light use, because that affects how confident I feel leaving my vehicle secured.

Security Features I Pay Attention To

When I compare options, I focus on the strength of the locking body, the quality of the key or mechanism, and how difficult it would be to force open. I also like locks with anti-corrosion coatings, especially if I tow in wet or salty conditions. In my view, a good tow bar pin lock should be tough enough to discourage quick theft attempts.

Ease of Use Matters to Me

I prefer a tow bar pin lock that I can install and remove quickly. If it takes too much effort, I know I’ll get frustrated and may stop using it consistently. A good design should let me secure my tow setup without tools and without unnecessary hassle. For me, convenience is a big part of whether a product is truly practical.

Checking Compatibility with My Tow Setup

I always confirm that the lock works with my specific tow bar, trailer hitch, or caravan coupling. Some locks fit standard sizes, but others are made for specific systems. I’ve learned that checking the dimensions and product description carefully saves me from buying the wrong item.

Build Quality and Durability

I usually judge a tow bar pin lock by how sturdy it feels in my hand. Heavy-duty metal construction gives me more confidence than lightweight materials. I also look at the finish, because a lock that rusts quickly won’t last long. In my experience, durability matters more than flashy features.

Price vs Value

I don’t always choose the cheapest option, because I’ve found that low cost can sometimes mean lower security. Instead, I look for the best balance between price, strength, and reliability. If a lock offers better protection and lasts longer, I consider it a better value even if it costs a bit more.

My Final Buying Tip

If I were choosing a tow bar pin lock today, I would focus on fit, strength, ease of use, and weather resistance first. Those are the things that matter most to me in real-world use. A good tow bar pin lock should give me peace of mind every time I leave my trailer or tow setup unattended.

Final Thoughts

I believe a tow bar pin lock is a simple but important way to add extra security and peace of mind when towing. My takeaway is that it helps protect your equipment from theft while giving you confidence that everything stays firmly in place. If I want a practical, affordable safety upgrade, this is one accessory I would seriously consider.

Author Profile

Amy Lewis
Amy Lewis
Hi, I'm Amy Lewis, and I'm so glad you're here. I created Amyiswriting.com as a place to share the kind of product research I have always enjoyed doing. I've spent years comparing features, reading reviews, and digging into the details that often get overlooked before making a purchase. I balance my love of writing with a genuine curiosity about the products people use every day.

Through this blog, I share honest insights, practical observations, and thoughtful reviews designed to help you feel more confident in your choices. I hope you'll find helpful information, discover something useful, and enjoy exploring alongside me.