We consider a boat trailer security device to be a worthy investment in the long run. Let’s take you step by step, type by type, and find the best boat trailer security device for you.

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Our Top Picks:

Best Overall: Buy: Master Lock Boat Trailer Security Device READ REVIEW

Best With Ball Mounts: Buy: Reese Boat Trailer Security Device READ REVIEW

Best For Great Price: Buy: Trimax Boat Trailer Security Device READ REVIEW

Best For Worth The Money: Buy: Czc Auto Boat Trailer Security Device READ REVIEW

Best For Trav Trailers: Buy: Reese Universal Coupler Lock READ REVIEW

Best For Corrosion Resistance: Buy: Amplock Trailer Lock READ REVIEW

Best For Solid Steel: Buy: Equipment Lock Company Boat Trailer Security Device READ REVIEW

Best For Universal Fit: Buy: Oxgord Boat Trailer Security Device READ REVIEW

Best For Rust Resistance: Buy: Amplock Boat Trailer Security Device READ REVIEW

Best For Bike Rack: Buy: Curt Boat Trailer Security Device READ REVIEW

Best Overall: Master Lock Boat Trailer Security Device

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The Master Lock Boat Trailer Security Device is long-lasting, rigid and fits well with your regular usage like a dream. The master lock boat trailer security device looks good, I bought this one and it has a tough design. Turn the key to position 2 and remove the key. The master lock 379atpy features a universal trailer coupler lock, designed to fit 1 - 7/8 in.

The security works as expected, fits great, it is very tough and has a simple design. In addition, it provides great value, feels sturdy, it is great for ease of use and has a very good design. Above all, the master lock boat trailer security device is best used for vehicles, trailers, and rvs.

Most customers agree that the device can be used as "part" of an overall solution. In addition, a few say that the security does but works better with regular style tongue. Also, a few also found that the part of the lock with " master lock " written on it goes on the front of the hitch.

• This is a great lock in theft-deterring bright yellow.
• This lock will not be defeated in a short amount of time.
• This does work with 2 5/16" travel trailer tongues.
• had to insert a ball of coupler lock into the unlatched trailer coupler.

Best With Ball Mounts: Reese Boat Trailer Security Device

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The real boat trailer security device should be able to handle its purpose and duties with ease. The Reese boat trailer security device features a ratchet design with six locking positions for versatility, and is designed to fit 1-7/8 in., 2 in., and 2-5/16 in. The Manufacturer says: With proven designs that exceed the industry standards, we are the brand of choice when performance is the expectation. The Reese towpower universal coupler lock is built strong and designed to fit 1-⅞ ”, 2 ”, and 2 - 5/16”couplers.

Above all, the Reese Boat Trailer Security Device offers durable, highly visible protection for all types of trailers.

Almost all buyers agree that the device is easy to pick key cut. Further, they say that the device can be tricky to get on/off the first few times for noobs. Further, a few strongly agree that the device provides pretty cheap insurance.

• It is very strong, is reasonable, it works like a charm and has a durable design.
• This comes with a nice finish and it is good for piece of mind.
• The distance between lock shackle holes center to center is 4-1/2 inchs.
• This is perfect for marine 2" hitch.

Best For Great Price: Trimax Boat Trailer Security Device

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Next on the list, we've got yet another security that manages to win our hearts. It's the Trimax Boat Trailer Security Device and it's widely considered as one of the most convenient security you can buy. The trimax boat trailersecurity device is reliable, it works like a charm and has a great design. Make sure this fits by entering your model number. This lock features a huge 6 - tooth, 3/8 " dual ratchet locking system, a hardened 5/8 " 16 mm steel shackle, and 1/2 - turn technology that can not be false locked.

The device is perfect for anti theft, works as described, it works perfectly and has a universal design. Most importantly, the trimax boat trailer security device is weather resistant, Thanks again, it is best for super heavy duty and has a simple design.

Most customers opine that the security is much cheaper here on amazon, too, and there is free shipping and no tax. In addition, they strongly agree that the device is great for securing the hitch. And, a few also found that this lock would survive all except for a professional attack, but likely nor would any other lock. With no doubts, this product passed the test and had very satisfied buyers eager to share their experience.

• Rugged and durable, the key will not bend or break.
• One size fits all (from 1-7/8", 2", to 2-5/16", all coupler types).
• This fits all of the following couplers and more.
• This is a good quality item... but a bit expensive.

Best For Worth The Money: Czc Auto Boat Trailer Security Device

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Czc Auto line of security comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Czc Auto Boat Trailer Security Device is made of high-strength steel to deter theft. Manufacturer says: Please verify the dimension and length of the pin you want before purchasing our coupler hitch lock pin. And, it is made worth the money, is used for perfect size, It looks very secure and has a compact design.

Lastly, the czc auto boattrailer securitydevice is black and it is made for good value.

Most customers found that the security is a pretty standard, low - priced hitch coupler lock. Also, they strongly agree that the security is more difficult to break than all the much more expensive ones. To sum up, for almost all buyers, it was the most suitable.

• This offers a low level of theft deterrent.
• Coupler locking hitch pin's application: tow trailer boat rv truck car.
• Keeping the coupler lock in your pocket or vehicle anywhere is fine.
• This fits thru the trailer hole without a problem.

Best For Trav Trailers: Reese Universal Coupler Lock

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate device. The Reese universal coupler lock is exactly that - it's a simple device that hits all the right notes. The Reese universal coupler lock works perfectly, It worked perfectly and has a very good design. Make sure this fits by entering your model number. Also, the security includes a swiveling clip additionally fits both 5/8 in., and 1/2 in.

Lastly, the Reese universal coupler lock is great for stainless steel and it makes for smooth operation.

Most buyers found that the security is great for locking your trailer. And, they strongly agree that the security comes with a smaller 1/2" diameter hitch pin that uses the same brass cylinder lock head. Also, a few strongly agree that this is a convenient set with one key operating all three locking elements.

• This is easy to use with one common key.
• This is more effective, is more reasonable, it is very happy and has a simple design.
• This fits all sizes of hitch.
• This is suitable for travel trailers.

Best For Corrosion Resistance: Amplock Trailer Lock

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If you want nothing but security that is reliable, this Amplock Trailer Lock is certainly a wise investment. The amplock trailer lock is highly recommend, is inexpensive, it is very rugged and has a tough design. The Manufacturer says: It is one of the keys driving our strict manufacturing process established across the years. The lock includes advanced security features increasing durability and deterrence abilities to come full circle.

The device is worth the money, is very nice, It is very heavy and has a great design. Most importantly, the amplock trailer lock is one of the weaknesses of the locks that seem heavy duty, but ultimately not against most basic diary tools.

Most buyers found that the device has a maintenance that will prevent the lock from freeze. Moreover, they also found that the security was hitting a part of the trailer’s ball-locking mechanism. Moreover, they say that this lock is sooooo strong and thick. In short, the tone of buyers is very positive and we believe that the security suits the purpose.

• This can be used on enclosed or open trailers, rv, boat trailers and more.
• Cylinder lock location makes it hard to access for thieves.
• This is totally worth the peace of mind.
• The manufacturer says: visit our store, choose wisely and enjoy your new amplock.

Best For Solid Steel: Equipment Lock Company Boat Trailer Security Device

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We would, of course, be remiss if we didn't mention Equipment Lock Company Boat Trailer Security Device for daily usage. The equipment lock company boat trailer security device is designed to worth every penny and has a universal design. Easy to follow instructions to ensure maximum protection for your trailer to moving equipment. And, this fits most any enclosed, it is portable and has a compact design.

Lastly, the equipment lock company boat trailer security device is very nice, It is best for customer service and has a good design.

Further, they also found that this locking device is a beast, and well worth the extra $ spent. With no doubts, this security passed the test and had very satisfied buyers eager to share their experience.

• This fits any size ball (1-7/8", 2", 2-5/16") or ring-pintle type trailer hitch.
• This provides security for all types of trucks, trailers, and ATV'S.
• Key system: barrel key lock for greater protection: includes 2 tubular lock keys.
• This happens. The lock must be wiggled a lot before it unlocks.

Best For Universal Fit: Oxgord Boat Trailer Security Device

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We would, of course, be remiss if we didn't mention Oxgord Boat Trailer Security Device for daily use. The oxgord boat trailersecurity device works perfectly, It is made for universal fit and has a durable design. You can’t always be in your trailer, so don’t you want some peace of mind when you’re away. This brass plated coupler lock will last for a long time and provides protection from the elements.

The device is very heavy, it is corrosion resistant and has a good design. Also, the device is very simple, is compact, it makes for nice quality and has a simple design. Most importantly, the oxgord boattrailer securitydevice is designed for good fit, It is great for fast shipping and has a compact design.

Most buyers opine that the security design is fine but the key is completely useless. In addition, a few strongly agree that the device works very well. good price and is easy to use.

• Easy to install: just slide in, and it will lock in place.
• Keys included: comes with two (2) keys.
• Secure: safely protects your trailer, boat, and camper from theft.
• It is designed for easy use, It is very nice and has a great design.

Best For Rust Resistance: Amplock Boat Trailer Security Device

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Amplock offers a variety of security for personal choice and yet maintains quality in all the variants. The Amplock Boat Trailer Security Device will be ineffective against mallet impacts. Open your trailer lock in order to install the 2 parts on your coupler. The lock includes advanced security features that increase durability and deterrence abilities.

The security has a screw master, It is great for customer service and has a great design. Above all, the amplock boat trailer security device can be used on enclosed or open trailers, rv, boat trailers and more.

Most buyers quickly discover that the device would have to take some time and make a lot of noise to take this thing off, which most chiefs won't bother doing. Further, a few say that the security is easy to use, built like a tank. Moreover, they say that this lock is massive and strong, no thief could defeat it. In short, many buyers have used the device for more than a few months without letup, and it shows no sign of giving up.

• The manufacturer says: visit our store, choose wisely and enjoy your new amplock.
• This is built for very heavy duty, It works as expected and has a tough design.
• Cylinder lock location makes it hard to access for thieves.
• Validate your measure and coupler with photos provided.

Best For Bike Rack: Curt Boat Trailer Security Device

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The Curt Boat Trailer Security Device has killer features for the price point. The curt boat trailer security device offers over 1, 000 different custom hitch models to provide a perfect, factory-like fit on most vehicles on the road nowadays. This right-angle trailer lock has a built-in swivel feature and simple 1/4-turn lock activation to allow the head to twist toward you for easy, ergonomic access when locking or unlocking your trailer. The internal components of this trailer pin lock can easily be protected from the elements with the included watertight dust cap, while the coupler lock head is shielded against corrosion with a durable anodized aluminum finish.

The security offers an adjustable pin span from 1" to 3" with a pin diameter of 1/4. Lastly, the curt boat trailer security device comes in standard hitch receiver sizes and provides flexible vertical adjustment to ensure level towing, even with large, lifted trucks and suvs.

Almost all buyers opine that the device is great for trailers with surge brakes. Moreover, a few say that the security is perfectly, easy to get on and off. To sum up, the tone of buyers is very positive and we believe that the security suits the purpose.

• Curt coupler locks are designed to add security to your trailer and towing equipment.
• For your convenience, two keys are included with this trailer tongue lock.
• These heavy-duty hitches are perfect for agriculture, construction and military towing.