Brand | Master Lock |
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Special Feature | Weather Resistant |
Lock Type | Key Lock |
Item Dimensions LxWxH | 5.6 x 4.3 x 2.8 inches |
Style | Trailer Hitch Lock |
Color | Chrome |
Number of Pieces | 3 |
Included Components | Unit^Instruction Guide |
Controller Type | Hand Control |
Manufacturer | Master Lock |
Model | Trailer Hitch Lock |
Item Weight | 1.83 pounds |
Product Dimensions | 5.6 x 4.3 x 2.8 inches |
Item model number | 377KA |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | 377KA |
Special Features | Weather Resistant |
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Ships from: Amazon Sold by: TheHardwareCityCom
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Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | Master Lock |
Special Feature | Weather Resistant |
Lock Type | Key Lock |
Item Dimensions LxWxH | 5.6 x 4.3 x 2.8 inches |
Style | Trailer Hitch Lock |
About this item
- Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers
- Trailer lock is best used for vehicles, trailers, and RVs
- Trailer coupler lock features advanced locking mechanism to resist picking and prying
- Trailer hitch lock is constructed from zinc to resist rust and corrosion
- One trailer coupler lock, two keys
Frequently bought together
Compare with similar items
This Item Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA | Recommendations | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | -24% $26.52$26.52 List: $34.99 | $32.99$32.99 | $13.37$13.37 | -17% $59.99$59.99 List: $71.99 | -28% $27.89$27.89 List: $38.99 |
Delivery | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 | Get it as soon as Monday, Apr 1 |
Customer Ratings | |||||
Easy to install | 4.5 | 4.6 | 3.8 | 4.5 | 4.5 |
Easy to use | 4.4 | 4.6 | 4.4 | 4.5 | 4.5 |
Security features | 4.5 | — | — | 5.0 | 5.0 |
Sturdiness | 3.6 | 4.6 | — | 4.8 | 4.8 |
Value for money | — | 4.5 | 4.2 | 4.2 | 4.2 |
Sold By | TheHardwareCityCom | Partner Co., Ltd. | Amazon.com | Tevlaphee-US | Tevlaphee-US |
lock type | Key Lock | coupler lock | Key Lock | Key Lock | Key Lock |
number of items | 1 | 0 | 1 | — | — |
material | — | Aluminum, Steel | Brass, Steel | Copper, Steel | Steel |
shape | — | U Shape | Rectangular | Wheel clamp | Irregular |
finish type | — | — | Polished | Painted | Painted |
weight | — | — | 0.2 kilograms | 8.8 pounds | 4.4 pounds |
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From the manufacturer
Master Lock 377KA Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers
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ApplicationGuards against trailer towaway theft. Best used for vehicles, trailers, and RVs. |
ConstructionTrailer hitch lock is constructed from zinc to resist rust and corrosion and features an advanced locking mechanism to resist picking and prying. |
SpecificationsTrailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers |
Key Positions
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Shackle Slides FreelyInsert key, turn to position 1 and pull shackle away from ball. Insert ball of coupler lock into unlatched trailer coupler. |
Shackle Ratchets Toward Ball/CouplerTurn key to position 2 and push shackle toward ball and coupler until the shackle will advance no further. |
Shackle is Dead LockedTurn key to position 3 and remove key. |
Product Description
The Master Lock 377KA Trailer Hitch Lock features a trailer coupler lock, designed to fit 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers. The advanced locking mechanism provides resistance to picking and prying..
Product information
Technical Details
Additional Information
ASIN | B001HATY36 |
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Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #4,481 in Automotive (See Top 100 in Automotive) #17 in Towing Hitch Locks |
Date First Available | October 3, 2008 |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance, value, weight and ease of use of the trailer hitch lock. For example, they mention it works well, is effective and easy to connect. Customers are also impresseded with the appearance, saying it looks good and has a nice chrome finish. That said, opinions are mixed on the fit.
AI-generated from the text of customer reviews
Customers like the quality of the lock. They say it is a nice heavy duty lock, solidly made, and worthy of the Master lock name. It is easy to connect and secures trailer against theft. Some like the style of the locking mechanism and say it works great for their trailer.
"Works perfectly. Unlocks and locks easily. Adjustable to fit other hitch sizes. Makes me sleep better knowing it is on there...." Read more
"This lock was easy to install and it keeps anyone from stealing my trailer." Read more
"...The trailer lock is sturdy, and it does not appear to be easily defeated (hack saw or bolt cutters)...." Read more
"Works great... Built great... fast shipping, would buy from again." Read more
Customers are satisfied with the performance of the lock. They mention that it works well, is effective, and yet small. Some say that it's quick and easy on and off, and works on all of their trailers.
"Works perfectly. Unlocks and locks easily. Adjustable to fit other hitch sizes. Makes me sleep better knowing it is on there...." Read more
"...This is fine, works great." Read more
"Works great... Built great... fast shipping, would buy from again." Read more
"Excellent design. Effective and yet small." Read more
Customers find the lock easy to use and install. They say it is simple, effective, and easy to connect. Customers also say it works easily and provides some level of theft protection.
"Easy to install, seems like it would be hard to remove for a thief. Hopefully we will never have to find out!!" Read more
"This lock was easy to install and it keeps anyone from stealing my trailer." Read more
"Perched to keep the honest honest. So far easy to install. I don’t think it can be cut off but it gives me peace of mind" Read more
"...Easy and simple to use and should at least deter theft of a trailer. Good bang for your buck." Read more
Customers like the value of the lock. They say it's a good design for a cheap price point, and well worth the money. Some customers also say it works as expected and is durable. Overall, most are happy with their purchase and recommend it to others.
"...Good bang for your buck." Read more
"...I think it is a good value and fits well, just hoping no one wants in bad enough to try to break it." Read more
"...Neat, affordable way to protect your trailer from runaway thieves...." Read more
"Very secure lock. A little pricey." Read more
Customers are satisfied with the appearance of the lock. They mention it has a very good design, and the finish is really nice. Some say that the lock looks great and feels solid. Overall, most are happy with their purchase and recommend it to others.
"Appears to be a good design. On time shippers" Read more
"Excellent design. Effective and yet small." Read more
"...This product does just that. Stainless steel shine makes this look a lot better then yellow locks. easy to lock and unlock...." Read more
"...All work fine; first has been out in the weather for about 3 years. Neat, affordable way to protect your trailer from runaway thieves...." Read more
Customers like the weight of the lock. They mention it's well constructed, very heavy, and not light weight. Some appreciate the small size and the fact that it'll save space while traveling.
"...I guess my property is just to secure. I like this one cause it’s not bulky like the others." Read more
"This is the absolute best and most secure hitch lock I have used. Heavy weight and durable made of stainless steel with no cast parts to be broken..." Read more
"...easy to lock and unlock. its heavy and solid feel works well for my trailer when not tied to my truck and all its security measures." Read more
"Heavy. Thick. Steel. This thing is not coming off the coupler without a fight...." Read more
Customers are mixed about the fit of the lock. Some mention that it fits securely, while others say that it's not tight by any means. The fit is adjustable to fit other hitch sizes, and is effective and yet small. However, some customers say that the lock doesn't fit their very standard run of the mill 2 inch coupler.
"it almost doesn't fit my 2" trailer hitch. it works, but it's tight." Read more
"Works perfectly. Unlocks and locks easily. Adjustable to fit other hitch sizes. Makes me sleep better knowing it is on there...." Read more
"Was a bit loose in the coupler. It works to be clear but probably doesn't quite "fit" the range of balls mentioned...." Read more
"Excellent design. Effective and yet small." Read more
Customers are dissatisfied with the keys of the lock. They mention that the keys are not unique, they broke easily, and some are bent.
"...the trailer in a while and needed to remove the lock but was unable to locate the key!..." Read more
"...First, they’re not keyed uniquely so I was able to use keys from a second one I had to open both of them...." Read more
"Piece of crap! I would give negative stars if I can. Key broke 1st time open, the whole thing can be whack with 2 strike from regular 16oz hammer." Read more
"...Each lock comes with two keys." Read more
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If you are on the fence about buying a trailer lock, Let me assure you it is an essential tool in the RV travel world. I would imagine that also applies to boats and other utility type trailers. I could say more...but back to this lock.
After purchasing this lock and using it, I switched it out with another lock I purchased. This lock blended in with the front of the trailer, the other one I purchased was a bright red color. So, while I like it, and I still own this lock, it is a backup to the red one that screams to would be thieves "Don't bother".
This is fine, works great.
Yes, there might be a better lock for your trailer, but my lightweight wheelers are fine with these locks. Get a padlock to fit your safety chains far an added bit of security. If this is on, and the chains are locked, It'd be just that much harder to hook up and steal it.