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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

4.6 4.6 out of 5 stars 3,440 ratings

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Trailer Hitch Lock

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
See more product details

Frequently bought together

$26.52
Get it as soon as Monday, Apr 1
In Stock
Sold by TheHardwareCityCom and ships from Amazon Fulfillment.
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$13.37
Get it as soon as Monday, Apr 1
In Stock
Ships from and sold by Amazon.com.
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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
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
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Price-24% $26.52
List:$34.99
$32.99$13.37-17% $59.99
List:$71.99
-28% $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

From the manufacturer

Master Lock 377KA Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers

Master Lock 377KA Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers

Trailer Coupler

Trailer Coupler

Trailer Coupler

Application

Guards against trailer towaway theft. Best used for vehicles, trailers, and RVs.

Construction

Trailer hitch lock is constructed from zinc to resist rust and corrosion and features an advanced locking mechanism to resist picking and prying.

Specifications

Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers

Key Positions

Step 1

Step 2

Step 3

Shackle Slides Freely

Insert key, turn to position 1 and pull shackle away from ball. Insert ball of coupler lock into unlatched trailer coupler.

Shackle Ratchets Toward Ball/Coupler

Turn key to position 2 and push shackle toward ball and coupler until the shackle will advance no further.

Shackle is Dead Locked

Turn key to position 3 and remove key.

Master Lock For Everything Worth Protecting

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

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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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


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What's in the box

  • Unit^Instruction Guide
  • Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    3,440 global ratings

    Customers 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

    450 customers mention387 positive63 negative

    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

    157 customers mention143 positive14 negative

    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

    117 customers mention113 positive4 negative

    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

    64 customers mention49 positive15 negative

    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

    55 customers mention55 positive0 negative

    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

    31 customers mention27 positive4 negative

    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

    155 customers mention68 positive87 negative

    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

    19 customers mention4 positive15 negative

    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

    Perfect function, fit and made well.
    5 Stars
    Perfect function, fit and made well.
    Not a bulky coupler like the others, solidly made. Sits in place tight when trailer latch is down. Easy to store when not in use. Just what I was hoping for. Looked at others but this one looked and works great....and the price was right.
    Thank you for your feedback
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    Top reviews from the United States

    Reviewed in the United States on February 1, 2024
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    Top reviews from other countries

    Translate all reviews to English
    James P. Cahill
    5.0 out of 5 stars Great trailer hitch lock.
    Reviewed in Canada on September 8, 2023
    Style: Trailer Hitch LockVerified Purchase
    E H
    5.0 out of 5 stars Buen producto y puntualidad en la entrega
    Reviewed in Mexico on February 5, 2020
    Style: Trailer Hitch LockVerified Purchase
    Edgar C.
    4.0 out of 5 stars Buen candado
    Reviewed in Mexico on February 9, 2023
    Style: Trailer Hitch LockVerified Purchase
    ALO
    5.0 out of 5 stars This is the one you want
    Reviewed in Canada on January 30, 2024
    Style: Trailer Hitch LockVerified Purchase
    Casey Ketter
    5.0 out of 5 stars Easy installation
    Reviewed in Canada on December 29, 2023
    Style: Trailer Hitch LockVerified Purchase